{"id":6859,"date":"2025-08-19T15:28:51","date_gmt":"2025-08-19T06:28:51","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=6859"},"modified":"2025-08-19T16:55:17","modified_gmt":"2025-08-19T07:55:17","slug":"database_norms","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/database_norms\/","title":{"rendered":"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5f62\u5fb9\u5e95\u89e3\u8aac\uff1a1NF\u304b\u3089BCNF\u307e\u3067"},"content":{"rendered":"\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6b63\u898f\u5316\u306b\u3064\u3044\u3066\u3001\u305d\u306e\u91cd\u8981\u6027\u304b\u3089\u5404\u6b63\u898f\u5f62\uff081NF\u30012NF\u30013NF\u3001BCNF\uff09\u306e\u5177\u4f53\u7684\u306a\u30eb\u30fc\u30eb\u3068\u76ee\u7684\u3092\u89e3\u8aac\u3057\u3001\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u6700\u9069\u306a\u8a2d\u8a08\u306e\u8003\u3048\u65b9\u3092\u63d0\u6848\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2>\u306f\u3058\u3081\u306b\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u91cd\u8981\u6027<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u73fe\u4ee3\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3044\u3066\u3001\u30c7\u30fc\u30bf\u306f\u610f\u601d\u6c7a\u5b9a\u306b\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u305d\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u304b\u3064\u4fe1\u983c\u6027\u9ad8\u304f\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u3001\u300c\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08RDB\uff09\u300d\u3068\u300c\u6b63\u898f\u5316\u300d\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001RDB\u306e\u57fa\u672c\u3068\u3001\u306a\u305c\u6b63\u898f\u5316\u304c\u5fc5\u8981\u306a\u306e\u304b\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306f\uff1f<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">RDB\u306f\u3001\u30c7\u30fc\u30bf\u3092\u300c\u30c6\u30fc\u30d6\u30eb\u300d\uff08\u884c\u3068\u5217\u306e\u8868\uff09\u3067\u6574\u7406\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u5404\u30c6\u30fc\u30d6\u30eb\u306f\u30d3\u30b8\u30cd\u30b9\u4e0a\u306e\u7279\u5b9a\u306e\u5bfe\u8c61\uff08\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff09\u3092\u8868\u3057\u3001\u884c\u306f\u500b\u3005\u306e\u30c7\u30fc\u30bf\u3001\u5217\u306f\u30c7\u30fc\u30bf\u9805\u76ee\u3067\u3059\u3002RDB\u306f\u3001SQL\uff08\u69cb\u9020\u5316\u30af\u30a8\u30ea\u30fc\u8a00\u8a9e\uff09\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u3001\u691c\u7d22\u3001\u7ba1\u7406\u3092\u52b9\u7387\u7684\u306b\u884c\u3044\u307e\u3059\u3002RDB\u306e\u4fe1\u983c\u6027\u3092\u652f\u3048\u308b\u306e\u306f\u3001ACID\u7279\u6027\uff08\u539f\u5b50\u6027\u3001\u4e00\u8cab\u6027\u3001\u72ec\u7acb\u6027\u3001\u6c38\u7d9a\u6027\uff09\u3067\u3059\u3002\u3053\u306e\u53b3\u683c\u306a\u30eb\u30fc\u30eb\u306b\u3088\u308a\u3001RDB\u306f\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u3001\u9ad8\u3044\u4fe1\u983c\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u5206\u91ce\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u306a\u305c\u6b63\u898f\u5316\u304c\u5fc5\u8981\u306a\u306e\u304b\uff1f\u76ee\u7684\u3068\u30e1\u30ea\u30c3\u30c8<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u300c\u6b63\u898f\u5316\u300d\u3068\u306f\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\uff08\u5197\u9577\u6027\uff09\u3092\u3067\u304d\u308b\u3060\u3051\u306a\u304f\u3057\u3001\u77db\u76fe\u306a\u304f\u52b9\u7387\u7684\u306b\u30c7\u30fc\u30bf\u3092\u6271\u3048\u308b\u3088\u3046\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306b\u3088\u3063\u3066\u5f97\u3089\u308c\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u591a\u304f\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001<strong>\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u78ba\u4fdd<\/strong>\u3057\u3001\u77db\u76fe\u3092\u9632\u304e\u3001\u5e38\u306b\u4e00\u8cab\u3057\u305f\u72b6\u614b\u3092\u4fdd\u3061\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3001\u633f\u5165\u3001\u524a\u9664\u6642\u306b\u767a\u751f\u3057\u3046\u308b\u300c\u7570\u5e38\u300d\uff08\u66f4\u65b0\u7570\u5e38\u3001\u633f\u5165\u7570\u5e38\u3001\u524a\u9664\u7570\u5e38\uff09\u3068\u3044\u3063\u305f\u5177\u4f53\u7684\u306a\u30ea\u30b9\u30af\u3092\u907f\u3051\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b21\u306b\u3001\u30c7\u30fc\u30bf\u3092\u9069\u5207\u306b\u5206\u5272\u30fb\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u3001<strong>\u30c7\u30fc\u30bf\u7ba1\u7406\u304c\u7c21\u5358<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u30c7\u30fc\u30bf\u306e\u5909\u66f4\u304c\u5fc5\u8981\u306b\u306a\u3063\u305f\u969b\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u7bc4\u56f2\u3092\u9650\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u4fee\u6b63\u306e\u624b\u9593\u3092\u6e1b\u3089\u3057\u3001\u30a8\u30e9\u30fc\u306e\u767a\u751f\u3092\u6291\u3048\u3001<strong>\u30c7\u30fc\u30bf\u3092\u67d4\u8edf\u306b\u5909\u66f4\u3067\u304d\u308b<\/strong>\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u52a0\u3048\u3066\u3001\u7121\u99c4\u306a\u30c7\u30fc\u30bf\u91cd\u8907\u3092\u6291\u3048\u308b\u3053\u3068\u3067\u3001<strong>\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u5229\u7528\u52b9\u7387\u304c\u5411\u4e0a<\/strong>\u3057\u3001\u30c7\u30fc\u30bf\u91cf\u306e\u524a\u6e1b\u3060\u3051\u3067\u306a\u304f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084\u5fa9\u65e7\u306b\u304b\u304b\u308b\u8ca0\u62c5\u3082\u6e1b\u3089\u305b\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u904b\u7528\u30b3\u30b9\u30c8\u524a\u6e1b\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306e\u57fa\u672c\u6982\u5ff5\uff1a\u30ad\u30fc\u3068\u95a2\u6570\u5f93\u5c5e\u6027<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306e\u5404\u30b9\u30c6\u30c3\u30d7\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u3001\u6700\u3082\u57fa\u672c\u3068\u306a\u308b\u306e\u304c\u300c\u30ad\u30fc\u300d\u3068\u300c\u95a2\u6570\u5f93\u5c5e\u6027\u300d\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u3001\u306a\u305c\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3059\u308b\u306e\u304b\u3001\u305d\u306e\u8ad6\u7406\u7684\u306a\u7406\u7531\u3092\u7406\u89e3\u3059\u308b\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u30ad\u30fc\u3068\u306f\uff1f<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u304a\u3051\u308b\u300c\u30ad\u30fc\u300d\u3068\u306f\u3001\u30c6\u30fc\u30d6\u30eb\uff08\u8868\uff09\u5185\u306e\u5404\u884c\uff08\u30ec\u30b3\u30fc\u30c9\uff09\u3092\u7279\u5b9a\u3057\u305f\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u540c\u58eb\u306e\u95a2\u9023\u4ed8\u3051\u3092\u884c\u3063\u305f\u308a\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u3001\u4e00\u3064\u307e\u305f\u306f\u8907\u6570\u306e\u30c7\u30fc\u30bf\u9805\u76ee\uff08\u5217\uff09\u306e\u96c6\u307e\u308a\u3067\u3059\u3002\u30ad\u30fc\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6574\u5408\u6027\uff08\u77db\u76fe\u304c\u306a\u3044\u3053\u3068\uff09\u3068\u52b9\u7387\u3092\u4fdd\u3064\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u4e3b\u306a\u30ad\u30fc\u306e\u7a2e\u985e\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/span><\/p>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u30b9\u30fc\u30d1\u30fc\u30ad\u30fc (Super Key):<\/strong> \u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u884c\u3092\u300c\u4e00\u610f\u306b\u300d\u8b58\u5225\u3067\u304d\u308b\u5c5e\u6027\u306e\u96c6\u307e\u308a\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<code>{\u793e\u54e1ID, \u6c0f\u540d, \u4f4f\u6240}<\/code> \u306f\u30b9\u30fc\u30d1\u30fc\u30ad\u30fc\u306b\u306a\u308a\u5f97\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u305d\u306e\u4e00\u90e8\u3060\u3051\u3067\u3082\u8b58\u5225\u3067\u304d\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u5019\u88dc\u30ad\u30fc (Candidate Key):<\/strong> \u30b9\u30fc\u30d1\u30fc\u30ad\u30fc\u306e\u4e2d\u3067\u3001<strong>\u6700\u3082\u5c11\u306a\u3044\u5c5e\u6027\u3067\u69cb\u6210\u3055\u308c\u3001\u304b\u3064\u5404\u884c\u3092\u300c\u4e00\u610f\u306b\u300d\u8b58\u5225\u3067\u304d\u308b\u5c5e\u6027\u306e\u96c6\u307e\u308a<\/strong>\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u5019\u88dc\u30ad\u30fc\u304b\u3089\u3069\u306e\u5c5e\u6027\u3092\u4e00\u3064\u3067\u3082\u524a\u9664\u3059\u308b\u3068\u3001\u4e00\u610f\u306b\u8b58\u5225\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u8907\u6570\u306e\u5019\u88dc\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u793e\u54e1\u30c6\u30fc\u30d6\u30eb\u3067\u300c\u793e\u54e1ID\u300d\u3068\u300c\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u300d\u304c\u305d\u308c\u305e\u308c\u30e6\u30cb\u30fc\u30af\u306a\u5024\u3092\u6301\u3064\u5834\u5408\u3001<code>{\u793e\u54e1ID}<\/code> \u3082 <code>{\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9}<\/code> \u3082\u5019\u88dc\u30ad\u30fc\u306b\u306a\u308a\u5f97\u307e\u3059\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u4e3b\u30ad\u30fc (Primary Key):<\/strong> \u30c6\u30fc\u30d6\u30eb\u306e\u8a2d\u8a08\u8005\u304c\u3001\u8907\u6570\u306e\u5019\u88dc\u30ad\u30fc\u306e\u4e2d\u304b\u3089<strong>\u305d\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4ee3\u8868\u3068\u3057\u3066\u9078\u3073\u3001\u884c\u3092\u4e00\u610f\u306b\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u3046\u30ad\u30fc<\/strong>\u3067\u3059\u3002\u4e3b\u30ad\u30fc\u3068\u3057\u3066\u9078\u3070\u308c\u305f\u5c5e\u6027\uff08\u307e\u305f\u306f\u5c5e\u6027\u306e\u96c6\u307e\u308a\uff09\u306f\u3001\u4ee5\u4e0b\u306e\u7279\u5fb4\u3092\u6301\u3061\u307e\u3059\u3002<\/span>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u4e00\u610f\u6027:<\/strong> \u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u884c\u3092\u5fc5\u305a\u300c\u4e00\u610f\u306b\u300d\u8b58\u5225\u3067\u304d\u308b\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u975eNULL\u6027:<\/strong> NULL\u5024\uff08\u4f55\u3082\u5165\u3063\u3066\u3044\u306a\u3044\u72b6\u614b\uff09\u3092\u6301\u3064\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002 \u30c6\u30fc\u30d6\u30eb\u5185\u3067\u4e3b\u30ad\u30fc\u306f\u4e00\u3064\u3060\u3051\u3067\u3059\u3002<\/span><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u308c\u3089\u306e\u30ad\u30fc\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6b63\u78ba\u6027\u3092\u4fdd\u8a3c\u3057\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u691c\u7d22\u3084\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u3092\u53ef\u80fd\u306b\u3059\u308b\u305f\u3081\u306e\u571f\u53f0\u3068\u306a\u308a\u307e\u3059\u3002\u6b63\u898f\u5316\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u3001\u7279\u306b\u5019\u88dc\u30ad\u30fc\u3084\u4e3b\u30ad\u30fc\u306e\u8003\u3048\u65b9\u304c\u6df1\u304f\u95a2\u308f\u3063\u3066\u304d\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u95a2\u6570\u5f93\u5c5e\u6027\u3068\u306f\uff1f<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u95a2\u6570\u5f93\u5c5e\u6027\uff08Functional Dependency\uff09\u3068\u306f\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u304a\u3044\u3066\u3001\u3042\u308b\u5c5e\u6027\uff08\u30c7\u30fc\u30bf\u9805\u76ee\u3001\u307e\u305f\u306f\u305d\u306e\u96c6\u307e\u308a\uff09\u306e\u5024\u304c\u6c7a\u307e\u308b\u3068\u3001\u4ed6\u306e\u5c5e\u6027\uff08\u307e\u305f\u306f\u305d\u306e\u96c6\u307e\u308a\uff09\u306e\u5024\u304c\u300c\u4e00\u610f\u306b\u300d\u6c7a\u307e\u308b\u3068\u3044\u3046\u6027\u8cea\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3044\u3046\u300c\u95a2\u6570\u300d\u306f\u6570\u5b66\u7684\u306a\u898f\u5247\u6027\u3067\u306f\u306a\u304f\u3001\u5358\u306b\u300c\u4e00\u3064\u6c7a\u307e\u308b\u3068\u3082\u3046\u4e00\u3064\u304c\u81ea\u52d5\u7684\u306b\u6c7a\u307e\u308b\u300d\u3068\u3044\u3046\u95a2\u4fc2\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u3053\u306e\u95a2\u4fc2\u306f\u300c<code>X<\/code> \u304c <code>Y<\/code> \u3092\u6c7a\u5b9a\u3059\u308b\u300d\u3068\u8868\u73fe\u3055\u308c\u3001<code>X \u2192 Y<\/code> \u3068\u8868\u8a18\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u4f8b:<\/strong><\/span><\/p>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><code>\u793e\u54e1ID \u2192 \u6c0f\u540d<\/code> \uff08\u793e\u54e1ID\u304c\u6c7a\u307e\u308c\u3070\u3001\u6c0f\u540d\u304c\u4e00\u610f\u306b\u6c7a\u307e\u308b\uff09<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><code>\u90f5\u4fbf\u756a\u53f7 \u2192 \u4f4f\u6240<\/code> \uff08\u90f5\u4fbf\u756a\u53f7\u304c\u6c7a\u307e\u308c\u3070\u3001\u4f4f\u6240\u304c\u4e00\u610f\u306b\u6c7a\u307e\u308b\uff09<\/span><\/li>\r\n<\/ul>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u3001\u7279\u306b\u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09\u4ee5\u964d\u306e\u6b63\u898f\u5316\u306f\u3001\u3053\u306e\u5c5e\u6027\u9593\u306e\u95a2\u6570\u5f93\u5c5e\u6027\u3092\u5206\u6790\u3057\u3001\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u884c\u308f\u308c\u307e\u3059\u3002<code>X \u2192 Y<\/code> \u306e\u95a2\u4fc2\u306b\u304a\u3044\u3066\u3001<code>X<\/code> \u3092\u300c\u6c7a\u5b9a\u9805\uff08Determinant\uff09\u300d\uff08Y\u3092\u6c7a\u5b9a\u3059\u308b\u5074\uff09\u3001<code>Y<\/code> \u3092\u300c\u5f93\u5c5e\u9805\uff08Dependent\uff09\u300d\uff08X\u306b\u6c7a\u5b9a\u3055\u308c\u308b\u5074\uff09\u3068\u547c\u3073\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u300c\u4e00\u610f\u306b\u6c7a\u307e\u308b\u300d\u3068\u3044\u3046\u53b3\u5bc6\u306a\u95a2\u4fc2\u306f\u3001\u5358\u306a\u308b\u95a2\u9023\u6027\u3084\u50be\u5411\u3067\u306f\u306a\u304f\u3001\u6c7a\u5b9a\u7684\u306a\u7d50\u3073\u3064\u304d\u3092\u793a\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300c\u793e\u54e1ID\u300d\u304c\u6c7a\u307e\u308c\u3070\u300c\u6c0f\u540d\u300d\u304c\u4e00\u610f\u306b\u6c7a\u307e\u308b\u95a2\u4fc2\u306f\u6210\u7acb\u3057\u307e\u3059\u304c\u3001\u540c\u59d3\u540c\u540d\u304c\u3044\u308b\u305f\u3081\u3001\u300c\u6c0f\u540d\u300d\u304c\u6c7a\u307e\u308c\u3070\u300c\u793e\u54e1ID\u300d\u304c\u4e00\u610f\u306b\u6c7a\u307e\u308b\u95a2\u4fc2\u306f\u901a\u5e38\u6210\u7acb\u3057\u307e\u305b\u3093\u3002\u3053\u306e\u300c\u65b9\u5411\u6027\u300d\u3068\u300c\u4e00\u610f\u6027\u300d\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3001\u7b2c\u4e8c\u6b63\u898f\u5f62\u3084\u7b2c\u4e09\u6b63\u898f\u5f62\u3067\u3069\u306e\u30c7\u30fc\u30bf\u3092\u5206\u96e2\u3059\u3079\u304d\u304b\u3092\u5224\u65ad\u3059\u308b\u969b\u306e\u8ad6\u7406\u7684\u306a\u7406\u7531\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u6982\u5ff5\u3092\u6df1\u304f\u7406\u89e3\u305b\u305a\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u5206\u5272\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u305d\u306e\u6839\u62e0\u304c\u66d6\u6627\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><span style=\"font-family: helvetica, arial, sans-serif\"><\/span><\/p>\r\n<p><!-- notionvc: a47afa27-66e1-4bcd-b75a-b80eb9830ee8 --><\/p>\n\n<h2>\u7b2c\u4e00\u6b63\u898f\u5f62 (1NF) \u3092\u7406\u89e3\u3059\u308b<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e00\u6b63\u898f\u5f62\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6b63\u898f\u5316\u306e\u6700\u521d\u306e\u3001\u305d\u3057\u3066\u6700\u3082\u57fa\u672c\u7684\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306e\u300c\u539f\u5b50\u6027\u300d\uff08\u3053\u308c\u4ee5\u4e0a\u5206\u89e3\u3067\u304d\u306a\u3044\u3053\u3068\uff09\u3092\u78ba\u4fdd\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u57fa\u672c\u7684\u306a\u69cb\u9020\u3092\u6574\u3048\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5b9a\u7fa9\u3068\u30eb\u30fc\u30eb<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5404\u30c6\u30fc\u30d6\u30eb\u304c\u4ee5\u4e0b\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u72b6\u614b\u3092\u6307\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u5404\u5217\u304c\u5358\u4e00\u306e\u5024\u3092\u6301\u3064\uff08\u539f\u5b50\u6027\uff09:<\/strong> \u5404\u30bb\u30eb\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u306b\u306f\u3001\u30ea\u30b9\u30c8\u3084\u914d\u5217\u306e\u3088\u3046\u306b\u8907\u6570\u306e\u5024\u3092\u542b\u307e\u305a\u3001\u4e00\u3064\u3060\u3051\u306e\u3001\u305d\u308c\u4ee5\u4e0a\u5206\u5272\u3067\u304d\u306a\u3044\u5024\u304c\u5165\u3063\u3066\u3044\u308b\u3053\u3068\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u304c\u5b58\u5728\u3057\u306a\u3044:<\/strong> \u30c6\u30fc\u30d6\u30eb\u5185\u306b\u540c\u3058\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u304c\u8907\u6570\u306e\u5217\u3068\u3057\u3066\u7e70\u308a\u8fd4\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\uff08\u4f8b:\u300c\u96fb\u8a71\u756a\u53f71\u300d\u300c\u96fb\u8a71\u756a\u53f72\u300d\u3068\u3044\u3063\u305f\u5217\u304c\u5b58\u5728\u305b\u305a\u3001\u5404\u96fb\u8a71\u756a\u53f7\u304c\u72ec\u7acb\u3057\u305f\u884c\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3079\u304d\u3067\u3059\uff09\u3002 1NF\u5316\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u300c\u6a2a\u65b9\u5411\u306e\u91cd\u8907\u300d\u3092\u306a\u304f\u3059\u65b9\u6cd5\u3068\u3082\u8a00\u3048\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3084\u77db\u76fe\u3092\u9632\u304e\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u57fa\u672c\u7684\u306a\u69cb\u9020\u304c\u6574\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5408\u8a08\u91d1\u984d\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u6c42\u3081\u3089\u308c\u308b\u5217\u306f\u3001\u901a\u5e38\u3001\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u8a18\u9332\u305b\u305a\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a08\u7b97\u3067\u51fa\u3059\u3079\u304d\u3068\u3055\u308c\u307e\u3059\u3002<\/span><\/li>\r\n<\/ul>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e1NF\u306f\u3001\u30c7\u30fc\u30bf\u306e\u77db\u76fe\u3092\u9632\u3050\u3060\u3051\u3067\u306a\u304f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u300c\u5229\u7528\u3057\u3084\u3059\u3055\u300d\u306b\u76f4\u63a5\u3064\u306a\u304c\u308b\u6700\u3082\u57fa\u672c\u7684\u306a\u30eb\u30fc\u30eb\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u8907\u6570\u306e\u96fb\u8a71\u756a\u53f7\u304c\u5165\u529b\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306a\u975e1NF\u306e\u30c7\u30fc\u30bf\u3067\u306f\u3001\u7279\u5b9a\u306e\u96fb\u8a71\u756a\u53f7\u3092\u52b9\u7387\u7684\u306b\u691c\u7d22\u3057\u305f\u308a\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u305f\u308a\u3059\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001SQL\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u8a00\u8a9e\uff09\u306e\u5229\u7528\u304c\u8907\u96d1\u306b\u306a\u308a\u3001\u30c7\u30fc\u30bf\u5206\u6790\u306e\u901f\u5ea6\u3082\u8457\u3057\u304f\u4f4e\u4e0b\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u30021NF\u3092\u6e80\u305f\u3059\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u3084\u5206\u6790\u306e\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5177\u4f53\u4f8b\u3067\u5b66\u30761NF\u5316<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u4ee5\u4e0b\u306b\u3001\u7b2c\u4e00\u6b63\u898f\u5f62\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3068\u3001\u305d\u308c\u30921NF\u5316\u3057\u305f\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><img decoding=\"async\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-171956-300x124.png\" alt=\"\" width=\"300\" height=\"124\" class=\"alignnone size-medium wp-image-6864\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-171956-300x124.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-171956-768x317.png 768w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-171956.png 838w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001\u300c\u90e8\u6d3b\u540d\u300d\u306e\u5217\u306b\u8907\u6570\u306e\u5024\u304c\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u975e1NF\u306e\u30c6\u30fc\u30d6\u30eb\u30921NF\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001\u5404\u30bb\u30eb\u304c\u5358\u4e00\u306e\u5024\u3092\u6301\u3064\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u3001\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u3092\u6392\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u4f8b\u3067\u306f\u3001\u751f\u5f92\u3068\u90e8\u6d3b\u306e\u60c5\u5831\u3092\u5206\u96e2\u3057\u3001\u300c\u751f\u5f92\u90e8\u6d3b\u30c6\u30fc\u30d6\u30eb\u300d\u3067\u5404\u751f\u5f92\u306e\u90e8\u6d3b\u3092\u72ec\u7acb\u3057\u305f\u884c\u3068\u3057\u3066\u8868\u73fe\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5404\u30bb\u30eb\u304c\u5358\u4e00\u306e\u5024\u3092\u6301\u3064\u3088\u3046\u306b\u306a\u308a\u3001\u7e70\u308a\u8fd4\u3057\u30b0\u30eb\u30fc\u30d7\u304c\u6392\u9664\u3055\u308c\u307e\u3059\u3002<br \/>\r\n<\/span><\/p>\n\n<h2>\u7b2c\u4e8c\u6b63\u898f\u5f62 (2NF) \u3078\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e8c\u6b63\u898f\u5f62\u306f\u3001\u7b2c\u4e00\u6b63\u898f\u5f62\u3092\u57fa\u76e4\u3068\u3057\u3001\u4e3b\u30ad\u30fc\u304c\u8907\u6570\u306e\u9805\u76ee\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u751f\u3058\u308b\u30c7\u30fc\u30bf\u306e\u91cd\u8907\uff08\u5197\u9577\u6027\uff09\u3092\u6392\u9664\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5b9a\u7fa9\u3068\u30eb\u30fc\u30eb<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09\u306f\u3001<strong>\u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09\u3092\u6e80\u305f\u3057\u305f\u4e0a\u3067\u3001\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u6027\u3092\u6392\u9664\u3057\u305f\u72b6\u614b<\/strong>\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u306e\u6b63\u898f\u5f62\u306f\u3001\u7279\u306b\u4e3b\u30ad\u30fc\u304c\u8907\u6570\u306e\u5c5e\u6027\uff08\u5217\uff09\u3067\u69cb\u6210\u3055\u308c\u308b\u300c\u8907\u5408\u4e3b\u30ad\u30fc\u300d\u3067\u3042\u308b\u5834\u5408\u306b\u91cd\u8981\u3068\u306a\u308a\u307e\u3059\u30022NF\u306e\u76ee\u7684\u306f\u3001\u4e3b\u30ad\u30fc\u306e\u4e00\u90e8\u3060\u3051\u3067\u6c7a\u307e\u3063\u3066\u3057\u307e\u3046\u4ed6\u306e\u5217\uff08\u975e\u30ad\u30fc\u5c5e\u6027\uff09\u3092\u306a\u304f\u3057\u3001\u300c\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u4e3b\u30ad\u30fc\u5168\u4f53\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3053\u3068\u300d\u3092\u4fdd\u8a3c\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u6027\u3068\u306f\uff1f<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u6027\u3068\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u8907\u5408\u4e3b\u30ad\u30fc\u3092\u69cb\u6210\u3059\u308b\u4e00\u90e8\u306e\u5c5e\u6027\u3060\u3051\u3067\u3001\u4ed6\u306e\u975e\u30ad\u30fc\u5c5e\u6027\u306e\u5024\u304c\u4e00\u610f\u306b\u6c7a\u307e\u3063\u3066\u3057\u307e\u3046\u95a2\u4fc2\u306e\u3053\u3068\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u8907\u5408\u4e3b\u30ad\u30fc\u304c <code>{A, B}<\/code> \u3067\u3001\u975e\u30ad\u30fc\u5c5e\u6027 <code>C<\/code> \u304c <code>A<\/code> \u3060\u3051\u3067\u6c7a\u307e\u308b\u5834\u5408\uff08<code>A \u2192 C<\/code>\uff09\u3001<code>C<\/code> \u306f\u8907\u5408\u4e3b\u30ad\u30fc <code>{A, B}<\/code> \u306b\u5bfe\u3057\u3066\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u3057\u3066\u3044\u308b\u3068\u8a00\u3048\u307e\u3059\u3002\u3053\u306e\u72b6\u614b\u3060\u3068\u3001\u4e3b\u30ad\u30fc\u306e\u4e00\u90e8\u304c\u5909\u308f\u308b\u3060\u3051\u3067\u95a2\u9023\u3059\u308b\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u91cd\u8907\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5177\u4f53\u4f8b\u3067\u5b66\u30762NF\u5316<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u4ee5\u4e0b\u306b\u3001\u7b2c\u4e8c\u6b63\u898f\u5f62\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3068\u3001\u305d\u308c\u30922NF\u5316\u3057\u305f\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><img decoding=\"async\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165825-300x204.png\" alt=\"\" width=\"300\" height=\"204\" class=\"alignnone size-medium wp-image-6861\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165825-300x204.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165825-768x522.png 768w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165825.png 836w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001<code>{\u4f1d\u7968ID, \u5546\u54c1ID}<\/code> \u304c\u8907\u5408\u4e3b\u30ad\u30fc\u3067\u3059\u3002 \u3057\u304b\u3057\u3001\u300c\u5546\u54c1\u540d\u300d\u3084\u300c\u5358\u4fa1\u300d\u306f <code>\u5546\u54c1ID<\/code> \u3060\u3051\u3067\u6c7a\u307e\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u8907\u5408\u4e3b\u30ad\u30fc\u306e\u4e00\u90e8\u3067\u3042\u308b <code>\u5546\u54c1ID<\/code> \u306b\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u540c\u3058\u300c\u5546\u54c1ID\u300d\uff08\u4f8b\u3048\u3070P001\uff09\u304c\u7570\u306a\u308b\u4f1d\u7968\u306b\u767b\u5834\u3059\u308b\u305f\u3073\u306b\u3001\u300c\u308a\u3093\u3054\u300d\u300c100\u300d\u3068\u3044\u3046\u60c5\u5831\u304c\u7e70\u308a\u8fd4\u3057\u8a18\u9332\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u4e0a\u8a18\u306e\u300c\u4f1d\u7968\u660e\u7d30\u30c6\u30fc\u30d6\u30eb\u300d\u306e\u4f8b\u3067\u306f\u3001<code>\u5546\u54c1\u540d<\/code>\u3084<code>\u5358\u4fa1<\/code>\u304c<code>\u5546\u54c1ID<\/code>\u306e\u307f\u306b\u4f9d\u5b58\u3057\u3001\u8907\u5408\u4e3b\u30ad\u30fc\u5168\u4f53\u306b\u306f\u4f9d\u5b58\u3057\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u30011\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u5185\u306b\u300c\u4f1d\u7968\u660e\u7d30\u306b\u95a2\u3059\u308b\u4e8b\u5b9f\u300d\uff08\u6570\u91cf\uff09\u3068\u300c\u5546\u54c1\u306b\u95a2\u3059\u308b\u4e8b\u5b9f\u300d\uff08\u5546\u54c1\u540d\u3001\u5358\u4fa1\uff09\u3068\u3044\u3046\u7570\u306a\u308b\u7a2e\u985e\u306e\u60c5\u5831\u304c\u6df7\u5728\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u30012NF\u306f\u3053\u308c\u3089\u306e\u4e8b\u5b9f\u3092\u305d\u308c\u305e\u308c\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u96e2\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30c6\u30fc\u30d6\u30eb\u30922NF\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001\u90e8\u5206\u95a2\u6570\u5f93\u5c5e\u3057\u3066\u3044\u308b\u5c5e\u6027\u3092\u5225\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5207\u308a\u51fa\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u6b63\u898f\u5316\u306b\u3088\u308a\u3001\u5546\u54c1\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u72ec\u7acb\u3057\u305f\u300c\u5546\u54c1\u30c6\u30fc\u30d6\u30eb\u300d\u306b\u5206\u96e2\u3055\u308c\u3001\u4f1d\u7968\u660e\u7d30\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u8907\u5408\u4e3b\u30ad\u30fc\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3059\u308b\u300c\u6570\u91cf\u300d\u306e\u307f\u304c\u6b8b\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u307e\u3059\u30022NF\u306f\u300c\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u5019\u88dc\u30ad\u30fc\u5168\u4f53\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3053\u3068\u300d\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u975e\u30ad\u30fc\u5c5e\u6027\u304c\u4e3b\u30ad\u30fc\u306e\u300c\u4e00\u90e8\u300d\u3067\u306f\u306a\u304f\u3001\u300c\u5168\u4f53\u300d\u306b\u4f9d\u5b58\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3068\u3044\u3046\u3001\u30c7\u30fc\u30bf\u9593\u306e\u8ad6\u7406\u7684\u306a\u95a2\u4fc2\u3092\u53b3\u5bc6\u306b\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u306f\u3088\u308a\u8ad6\u7406\u7684\u306b\u4e00\u8cab\u6027\u306e\u3042\u308b\u3082\u306e\u3068\u306a\u308a\u3001\u7570\u306a\u308b\u7a2e\u985e\u306e\u60c5\u5831\u304c\u4e0d\u9069\u5207\u306b\u7d50\u5408\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u304e\u307e\u3059\u3002<\/span><span style=\"font-family: helvetica, arial, sans-serif\"><\/span><\/p>\n\n<h2>\u7b2c\u4e09\u6b63\u898f\u5f62 (3NF) \u3067\u3055\u3089\u306b\u6d17\u7df4<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e09\u6b63\u898f\u5f62\u306f\u3001\u7b2c\u4e8c\u6b63\u898f\u5f62\u3092\u3055\u3089\u306b\u6d17\u7df4\u3055\u305b\u3001\u4e3b\u30ad\u30fc\u4ee5\u5916\u306e\u9805\u76ee\u9593\u306e\u9593\u63a5\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\uff08\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\uff09\u3092\u6392\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5b9a\u7fa9\u3068\u30eb\u30fc\u30eb<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\u306f\u3001<strong>2NF\u3092\u6e80\u305f\u3057\u305f\u4e0a\u3067\u3001\u975e\u30ad\u30fc\u5c5e\u6027\u9593\u306e\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3092\u6392\u9664\u3059\u308b<\/strong>\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u4e3b\u30ad\u30fc\u4ee5\u5916\u306e\u5c5e\u6027\u304c\u3001\u4e3b\u30ad\u30fc\u4ee5\u5916\u306e\u5225\u306e\u5c5e\u6027\u3092\u4ecb\u3057\u3066\u4e3b\u30ad\u30fc\u306b\u4f9d\u5b58\u3059\u308b\u95a2\u4fc2\uff08\u9593\u63a5\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\uff09\u3092\u89e3\u6d88\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3068\u306f\uff1f<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3068\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306b\u304a\u3044\u3066\u3001\u8907\u6570\u306e\u95a2\u6570\u5f93\u5c5e\u95a2\u4fc2\u304c\u6bb5\u968e\u7684\u306b\u6210\u308a\u7acb\u3064\u95a2\u4fc2\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u5c5e\u6027 <code>X<\/code> \u304b\u3089 <code>Y<\/code> \u304c\u4e00\u610f\u306b\u6c7a\u307e\u308a\uff08<code>X \u2192 Y<\/code>\uff09\u3001\u3055\u3089\u306b <code>Y<\/code> \u304b\u3089 <code>Z<\/code> \u304c\u4e00\u610f\u306b\u6c7a\u307e\u308b\uff08<code>Y \u2192 Z<\/code>\uff09\u5834\u5408\u3001<code>Z<\/code> \u306f <code>X<\/code> \u306b\u300c\u63a8\u79fb\u7684\u306b\u300d\u5f93\u5c5e\u3057\u3066\u3044\u308b\u3068\u8a00\u3044\u307e\u3059\uff08<code>X \u2192 Z<\/code>\uff09\u3002\u3053\u306e\u3068\u304d\u3001<code>Z<\/code> \u306f\u4e3b\u30ad\u30fc <code>X<\/code> \u306b\u76f4\u63a5\u4f9d\u5b58\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u975e\u30ad\u30fc\u5c5e\u6027 <code>Y<\/code> \u3092\u4ecb\u3057\u3066\u9593\u63a5\u7684\u306b\u6c7a\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u614b\u306f\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3084\u77db\u76fe\u3092\u5f15\u304d\u8d77\u3053\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u6b63\u898f\u5316\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u89e3\u6d88\u304c\u5fc5\u8981\u3067\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5177\u4f53\u4f8b\u3067\u5b66\u30763NF\u5316<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u4ee5\u4e0b\u306b\u3001\u7b2c\u4e09\u6b63\u898f\u5f62\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u3068\u3001\u305d\u308c\u30923NF\u5316\u3057\u305f\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><img decoding=\"async\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165923-300x198.png\" alt=\"\" width=\"300\" height=\"198\" class=\"alignnone size-medium wp-image-6862\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165923-300x198.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165923-768x506.png 768w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165923.png 843w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001<\/span><code>\u793e\u54e1ID<\/code><span style=\"font-family: helvetica, arial, sans-serif\"> \u304c\u4e3b\u30ad\u30fc\u3067\u3059\u3002<\/span><code>\u793e\u54e1ID \u2192 \u90e8\u7f72ID<\/code><span style=\"font-family: helvetica, arial, sans-serif\"> \u306e\u95a2\u4fc2\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002 \u3057\u304b\u3057\u3001\u300c\u90e8\u7f72ID\u300d\u304c\u6c7a\u307e\u308c\u3070\u300c\u90e8\u7f72\u540d\u300d\u3068\u300c\u90e8\u7f72\u96fb\u8a71\u300d\u304c\u4e00\u610f\u306b\u6c7a\u307e\u308a\u307e\u3059\uff08<\/span><code>\u90e8\u7f72ID \u2192 \u90e8\u7f72\u540d, \u90e8\u7f72\u96fb\u8a71<\/code><span style=\"font-family: helvetica, arial, sans-serif\">\uff09\u3002\u3053\u306e\u3068\u304d\u3001\u300c\u90e8\u7f72\u540d\u300d\u3084\u300c\u90e8\u7f72\u96fb\u8a71\u300d\u306f <\/span><code>\u793e\u54e1ID<\/code><span style=\"font-family: helvetica, arial, sans-serif\"> \u306b\u76f4\u63a5\u4f9d\u5b58\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u90e8\u7f72ID\u300d\u3092\u4ecb\u3057\u3066\u9593\u63a5\u7684\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\uff08<\/span><code>\u793e\u54e1ID \u2192 \u90e8\u7f72ID \u2192 \u90e8\u7f72\u540d, \u90e8\u7f72\u96fb\u8a71<\/code><span style=\"font-family: helvetica, arial, sans-serif\">\uff09\u3002\u3053\u308c\u304c\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3067\u3059\u3002\u540c\u3058\u90e8\u7f72\u306e\u793e\u54e1\u304c\u8907\u6570\u3044\u308b\u5834\u5408\u3001\u90e8\u7f72\u540d\u3084\u90e8\u7f72\u96fb\u8a71\u304c\u91cd\u8907\u3057\u3066\u8a18\u9332\u3055\u308c\u3001\u90e8\u7f72\u306e\u60c5\u5831\u304c\u5909\u66f4\u3055\u308c\u305f\u969b\u306b\u8907\u6570\u306e\u884c\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u751f\u3058\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u4f8b\u306b\u304a\u3051\u308b<code>\u90e8\u7f72\u540d<\/code>\u3084<code>\u90e8\u7f72\u96fb\u8a71<\/code>\u306f\u3001<code>\u90e8\u7f72<\/code>\u306b\u95a2\u3059\u308b\u4e8b\u5b9f\u3067\u3042\u308a\u3001<code>\u793e\u54e1ID<\/code>\u306b\u76f4\u63a5\u95a2\u3059\u308b\u4e8b\u5b9f\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3082\u3057\u8907\u6570\u306e\u793e\u54e1\u304c\u540c\u3058\u90e8\u7f72\u306b\u3044\u308b\u5834\u5408\u3001\u305d\u306e\u90e8\u7f72\u306e<code>\u90e8\u7f72\u540d<\/code>\u3084<code>\u90e8\u7f72\u96fb\u8a71<\/code>\u306f\u5404\u793e\u54e1\u306e\u30ec\u30b3\u30fc\u30c9\u3067\u91cd\u8907\u3057\u3066\u8a18\u9332\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u90e8\u7f72\u306e\u60c5\u5831\u304c\u5909\u308f\u3063\u305f\u5834\u5408\u3001\u305d\u306e\u90e8\u7f72\u306b\u5c5e\u3059\u308b\u5168\u3066\u306e\u793e\u54e1\u30ec\u30b3\u30fc\u30c9\u3092\u66f4\u65b0\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u3001\u629c\u3051\u6f0f\u308c\u304c\u751f\u3058\u308b\u3068\u77db\u76fe\u304c\u767a\u751f\u3057\u307e\u3059\u30023NF\u306f\u3053\u306e\u3088\u3046\u306a\u300c\u4e8b\u5b9f\u306b\u95a2\u3059\u308b\u4e8b\u5b9f\u300d\uff08\u9593\u63a5\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\uff09\u3092\u5206\u96e2\u3059\u308b\u3053\u3068\u3067\u3001\u66f4\u65b0\u306e\u67d4\u8edf\u6027\u3092\u9ad8\u3081\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30c6\u30fc\u30d6\u30eb\u30923NF\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3092\u6301\u3064\u5c5e\u6027\u3092\u5225\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5207\u308a\u51fa\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u6b63\u898f\u5316\u306b\u3088\u308a\u3001\u90e8\u7f72\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u72ec\u7acb\u3057\u305f\u300c\u90e8\u7f72\u30c6\u30fc\u30d6\u30eb\u300d\u306b\u5206\u96e2\u3055\u308c\u3001\u793e\u54e1\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u306f\u300c\u90e8\u7f72\u540d\u300d\u3068\u300c\u90e8\u7f72\u96fb\u8a71\u300d\u304c\u524a\u9664\u3055\u308c\u3001\u300c\u90e8\u7f72ID\u300d\u304c\u5916\u90e8\u30ad\u30fc\u3068\u3057\u3066\u6b8b\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u304c\u307b\u3068\u3093\u3069\u306a\u304f\u306a\u308a\u3001\u66f4\u65b0\u6642\u306e\u77db\u76fe\u30ea\u30b9\u30af\u304c\u4f4e\u6e1b\u3057\u307e\u3059\u30023NF\u306f\u300c\u3055\u3089\u306b\u5206\u96e2\u3067\u304d\u308b\u90e8\u5206\u3092\u5206\u96e2\u3059\u308b\u300d\u3053\u3068\u3067\u3001\u3088\u308a\u5c0f\u3055\u304f\u3001\u7126\u70b9\u3092\u7d5e\u3063\u305f\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u3088\u308a\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u3001\u67d4\u8edf\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u3064\u306a\u304c\u308a\u3001\u5c06\u6765\u7684\u306a\u62e1\u5f35\u3084\u5909\u66f4\u3078\u306e\u5bfe\u5fdc\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\r\n<\/span><\/p>\n\n<h2>\u30dc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62 (BCNF) \u306e\u53b3\u683c\u306a\u30eb\u30fc\u30eb<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30dc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\uff08BCNF\uff09\u306f\u3001\u7b2c\u4e09\u6b63\u898f\u5f62\u3088\u308a\u3082\u3055\u3089\u306b\u53b3\u683c\u306a\u6761\u4ef6\u3092\u6301\u3064\u6b63\u898f\u5f62\u3067\u3042\u308a\u3001\u7279\u5b9a\u306e\u30b1\u30fc\u30b9\u30673NF\u3067\u306f\u6349\u3048\u304d\u308c\u306a\u3044\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6392\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u5b9a\u7fa9\u30683NF\u3068\u306e\u9055\u3044<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">BCNF\u306f\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3051\u308b\u6b63\u898f\u5316\u306e\u4e00\u5f62\u614b\u3067\u3042\u308a\u3001<strong>\u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\u3088\u308a\u3082\u53b3\u683c\u306a\u6761\u4ef6<\/strong>\u3092\u6301\u3061\u307e\u3059\u3002BCNF\u306e\u4e3b\u306a\u30eb\u30fc\u30eb\u306f\u3001\u300c<strong>\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u3059\u3079\u3066\u306e\u6c7a\u5b9a\u56e0\u5b50\uff08\u4ed6\u306e\u5c5e\u6027\u3092\u4e00\u610f\u306b\u6c7a\u5b9a\u3059\u308b\u5c5e\u6027\u307e\u305f\u306f\u5c5e\u6027\u306e\u96c6\u5408\uff09\u304c\u3001\u305d\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u5019\u88dc\u30ad\u30fc\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044<\/strong>\u300d\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u3042\u308b\u9805\u76ee\u304c\u4ed6\u306e\u9805\u76ee\u3092\u6c7a\u5b9a\u3059\u308b\u529b\u3092\u6301\u3063\u3066\u3044\u308b\u306a\u3089\u3001\u305d\u306e\u9805\u76ee\u81ea\u4f53\u304c\u305d\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u8b58\u5225\u3067\u304d\u308b\u6700\u3082\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u300c\u5019\u88dc\u30ad\u30fc\u300d\u3067\u3042\u308b\u3079\u304d\u3060\u3001\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u304c\u300c\u4e00\u610f\u306b\u300d\u8b58\u5225\u3055\u308c\u308b\u5fc5\u8981\u6027\u3092\u5f37\u8abf\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">3NF\u306f\u300c\u4e3b\u30ad\u30fc\u4ee5\u5916\u306e\u5c5e\u6027\u9593\u306e\u9593\u63a5\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\u300d\u306e\u6392\u9664\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002\u3057\u304b\u3057\u3001BCNF\u306f\u3001<strong>\u6c7a\u5b9a\u56e0\u5b50\u304c\u4e3b\u30ad\u30fc\u3067\u306f\u306a\u3044\u9805\u76ee\u3067\u3042\u308b\u5834\u5408<\/strong>\u3084\u3001<strong>\u8907\u6570\u306e\u5019\u88dc\u30ad\u30fc\u304c\u8907\u96d1\u306b\u91cd\u306a\u308a\u5408\u3063\u3066\u3044\u308b\u5834\u5408<\/strong>\u306b\u751f\u3058\u308b\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3082\u6392\u9664\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001BCNF\u306f\u30c7\u30fc\u30bf\u9805\u76ee\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u306b\u3001\u3088\u308a\u5f37\u3044\u5236\u7d04\u3092\u8ab2\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u30013NF\u304c\u975e\u30ad\u30fc\u5c5e\u6027\u9593\u306e\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u306b\u7126\u70b9\u3092\u5f53\u3066\u308b\u306e\u306b\u5bfe\u3057\u3001BCNF\u306f\u3001\u305f\u3068\u3048\u6c7a\u5b9a\u56e0\u5b50\u304c\u4e3b\u30ad\u30fc\u4ee5\u5916\u306e\u9805\u76ee\u3067\u3042\u3063\u3066\u3082\u3001\u305d\u308c\u304c\u4ed6\u306e\u9805\u76ee\u3092\u6c7a\u5b9a\u3059\u308b\u80fd\u529b\u3092\u6301\u3064\u306a\u3089\u3070\u3001\u305d\u306e\u6c7a\u5b9a\u56e0\u5b50\u81ea\u4f53\u304c\u5019\u88dc\u30ad\u30fc\u3067\u3042\u308b\u3079\u304d\u3060\u3068\u3044\u3046\u3001\u3088\u308a\u6df1\u3044\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u8ffd\u6c42\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">BCNF\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u3068\u5177\u4f53\u4f8b<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">BCNF\u306f\u30013NF\u3067\u306f\u89e3\u6c7a\u3067\u304d\u306a\u3044\u3001\u3088\u308a\u8907\u96d1\u306a\u95a2\u6570\u5f93\u5c5e\u6027\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u4e3b\u306b\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306b\u8907\u6570\u306e\u5019\u88dc\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u305d\u308c\u3089\u304c\u8907\u96d1\u306b\u7d61\u307f\u5408\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><img decoding=\"async\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165947-300x209.png\" alt=\"\" width=\"300\" height=\"209\" class=\"alignnone size-medium wp-image-6863\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165947-300x209.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165947-768x534.png 768w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-19-165947.png 841w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u3010\u524d\u63d0\u6761\u4ef6\u3011<\/strong><\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u5b66\u751f\u306f\u8907\u6570\u306e\u79d1\u76ee\u3092\u53d7\u8b1b\u3067\u304d\u308b\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u79d1\u76ee\u306f\u8907\u6570\u306e\u5b66\u751f\u306b\u53d7\u8b1b\u3055\u308c\u308b\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb<strong>\u5404\u79d1\u76ee\u306f\u7279\u5b9a\u306e\u6559\u6388\u304c\u62c5\u5f53\u3059\u308b<\/strong>\uff08\u4f8b: DB\u306f\u7530\u4e2d\u6559\u6388\u306e\u307f\uff09\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb<strong>\u5404\u6559\u6388\u306f\u7279\u5b9a\u306e\u79d1\u76ee\u306e\u307f\u3092\u62c5\u5f53\u3059\u308b<\/strong>\uff08\u4f8b: \u7530\u4e2d\u6559\u6388\u306fDB\u306e\u307f\uff09\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u3010\u89e3\u8aac\u3011<\/strong><\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u4e3b\u30ad\u30fc\u306f <code>{\u5b66\u751fID, \u79d1\u76ee\u540d}<\/code> \u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb<code>\u79d1\u76ee\u540d \u2192 \u62c5\u5f53\u6559\u6388<\/code> \u3068\u3044\u3046\u95a2\u6570\u5f93\u5c5e\u6027\u304c\u5b58\u5728\u3057\u307e\u3059\uff08\u5404\u79d1\u76ee\u306f\u7279\u5b9a\u306e\u6559\u6388\u304c\u62c5\u5f53\u3059\u308b\u305f\u3081\uff09\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb<code>\u62c5\u5f53\u6559\u6388 \u2192 \u79d1\u76ee\u540d<\/code> \u3068\u3044\u3046\u95a2\u6570\u5f93\u5c5e\u6027\u3082\u5b58\u5728\u3057\u307e\u3059\uff08\u5404\u6559\u6388\u306f\u7279\u5b9a\u306e\u79d1\u76ee\u306e\u307f\u3092\u62c5\u5f53\u3059\u308b\u305f\u3081\uff09\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306f3NF\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001<code>\u62c5\u5f53\u6559\u6388<\/code> \u306f\u975e\u30ad\u30fc\u5c5e\u6027\u3067\u3042\u308a\u3001<code>\u79d1\u76ee\u540d<\/code> \u306f\u975e\u30ad\u30fc\u5c5e\u6027\u3067\u3059\u304c\u3001<code>\u79d1\u76ee\u540d<\/code> \u306f\u4e3b\u30ad\u30fc\u306e\u4e00\u90e8\u3067\u3042\u308b\u305f\u3081\u3001\u63a8\u79fb\u7684\u95a2\u6570\u5f93\u5c5e\u6027\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u307e\u305f\u3001<code>\u62c5\u5f53\u6559\u6388<\/code> \u306f\u4e3b\u30ad\u30fc\u306e\u4e00\u90e8\u306b\u3082\u3001\u4e3b\u30ad\u30fc\u5168\u4f53\u306b\u3082\u4f9d\u5b58\u305b\u305a\u3001<code>\u79d1\u76ee\u540d<\/code> \u306b\u306e\u307f\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u3057\u304b\u3057\u3001BCNF\u306e\u30eb\u30fc\u30eb\u300c\u3059\u3079\u3066\u306e\u6c7a\u5b9a\u56e0\u5b50\u304c\u5019\u88dc\u30ad\u30fc\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u300d\u306b\u7167\u3089\u3059\u3068\u3001<code>\u79d1\u76ee\u540d<\/code> \u3068 <code>\u62c5\u5f53\u6559\u6388<\/code> \u306f\u4e92\u3044\u306b\u6c7a\u5b9a\u56e0\u5b50\u3067\u3059\u304c\u3001\u3069\u3061\u3089\u3082\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u5019\u88dc\u30ad\u30fc\uff08<code>{\u5b66\u751fID, \u79d1\u76ee\u540d}<\/code>\uff09\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u308c\u306fBCNF\u306b\u9055\u53cd\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u2192\u30c7\u30fc\u30bf\u306e\u91cd\u8907\uff1a<code>\u79d1\u76ee\u540d<\/code> \u3068 <code>\u62c5\u5f53\u6559\u6388<\/code> \u306e\u30da\u30a2\uff08\u4f8b\uff1a\u300cDB, \u7530\u4e2d\u300d\uff09\u304c\u3001\u305d\u306e\u79d1\u76ee\u3092\u5c65\u4fee\u3059\u308b\u5b66\u751f\u306e\u6570\u3060\u3051\u7e70\u308a\u8fd4\u3057\u8a18\u9332\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u4f8b\u306f\u3001<code>\u79d1\u76ee\u540d<\/code>\uff08\u4e3b\u30ad\u30fc\u3067\u306f\u306a\u3044\u9805\u76ee\uff09\u304c<code>\u62c5\u5f53\u6559\u6388<\/code>\uff08\u4e3b\u30ad\u30fc\u3067\u306f\u306a\u3044\u9805\u76ee\uff09\u3092\u6c7a\u5b9a\u3057\u3001\u304b\u3064<code>\u62c5\u5f53\u6559\u6388<\/code>\u304c<code>\u79d1\u76ee\u540d<\/code>\u3092\u6c7a\u5b9a\u3059\u308b\u3088\u3046\u306a\u76f8\u4e92\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u308b\u5834\u5408\u30013NF\u306f\u6e80\u305f\u3057\u3066\u3082BCNF\u306f\u6e80\u305f\u3055\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002BCNF\u306f\u3053\u306e\u3088\u3046\u306a\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u3092\u5206\u96e2\u3057\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3068\u66f4\u65b0\u7570\u5e38\u306e\u53ef\u80fd\u6027\u3092\u3055\u3089\u306b\u6392\u9664\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30013NF\u304c\u898b\u843d\u3068\u3059\u300c\u4e3b\u30ad\u30fc\u3067\u306f\u306a\u3044\u9805\u76ee\u304c\u5019\u88dc\u30ad\u30fc\u306e\u4e00\u90e8\u3092\u6c7a\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u5fae\u5999\u306a\u91cd\u8907\u3092\u89e3\u6c7a\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u3092BCNF\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001<code>\u79d1\u76ee\u540d<\/code>\u3068<code>\u62c5\u5f53\u6559\u6388<\/code>\u306e\u9593\u306e\u76f8\u4e92\u4f9d\u5b58\u95a2\u4fc2\u3092\u72ec\u7acb\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u96e2\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306b\u3088\u308a\u3001<code>\u79d1\u76ee\u540d<\/code>\u3068<code>\u62c5\u5f53\u6559\u6388<\/code>\u306e\u9593\u306e\u76f8\u4e92\u4f9d\u5b58\u95a2\u4fc2\u304c\u72ec\u7acb\u3057\u305f<code>\u79d1\u76ee\u62c5\u5f53\u30c6\u30fc\u30d6\u30eb<\/code>\u306b\u5206\u96e2\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001<code>\u79d1\u76ee\u540d<\/code>\u3068<code>\u62c5\u5f53\u6559\u6388<\/code>\u306e\u30da\u30a2\u306e\u91cd\u8907\u304c\u89e3\u6d88\u3055\u308c\u3001\u3088\u308a\u53b3\u5bc6\u306a\u30c7\u30fc\u30bf\u6574\u5408\u6027\u304c\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">BCNF\u306f\u7406\u8ad6\u4e0a\u3001\u4f9d\u5b58\u95a2\u4fc2\u306b\u57fa\u3065\u304f\u6b63\u898f\u5316\u306e\u6700\u9ad8\u30ec\u30d9\u30eb\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u9069\u7528\u306f\u30c7\u30fc\u30bf\u306e\u5b8c\u5168\u306a\u6574\u5408\u6027\u3068\u8a2d\u8a08\u306e\u8907\u96d1\u3055\u306e\u9593\u306e\u300c\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u300d\u3092\u4f34\u3044\u307e\u3059\u3002\u6b63\u898f\u5316\u5168\u822c\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u300c\u8907\u96d1\u3055\u300d\u3084\u300c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u300d\u304c\u6319\u3052\u3089\u308c\u308b\u3053\u3068\u304b\u3089\u3001BCNF\u306e\u9069\u7528\u306f\u3001\u3088\u308a\u591a\u304f\u306e\u30c6\u30fc\u30d6\u30eb\u5206\u5272\u3068\u8907\u96d1\u306a\u7d50\u5408\u64cd\u4f5c\u3092\u4f34\u3046\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3068\u63a8\u6e2c\u3055\u308c\u307e\u3059\u3002\u591a\u304f\u306e\u5b9f\u7528\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u304c3NF\u3067\u8a2d\u8a08\u3092\u6b62\u3081\u308b\u306e\u306f\u3001\u3053\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u7d50\u679c\u3067\u3042\u308a\u3001BCNF\u306e\u9069\u7528\u306f\u3001\u6975\u3081\u3066\u9ad8\u3044\u30c7\u30fc\u30bf\u6574\u5408\u6027\u304c\u8981\u6c42\u3055\u308c\u308b\u7279\u5b9a\u306e\u30b1\u30fc\u30b9\u306b\u9650\u5b9a\u3055\u308c\u308b\u3079\u304d\u3060\u304b\u3089\u3067\u3059\u3002<br \/>\r\n<\/span><\/p>\n\n<h2>\u6b63\u898f\u5316\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u975e\u6b63\u898f\u5316\u306e\u9078\u629e<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306f\u591a\u304f\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u9069\u7528\u306b\u306f\u30de\u30a4\u30ca\u30b9\u9762\u3082\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u6b63\u898f\u5316\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3001\u3042\u3048\u3066\u6b63\u898f\u5316\u3092\u3057\u306a\u3044\u300c\u975e\u6b63\u898f\u5316\u300d\u3068\u3044\u3046\u9078\u629e\u80a2\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u3068\u30af\u30a8\u30ea\u306e\u8907\u96d1\u5316<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u306e\u6700\u3082\u4ee3\u8868\u7684\u306a\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u3001<strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b<\/strong>\u3067\u3059\u3002\u30c7\u30fc\u30bf\u3092\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u300cJOIN\u300d\u64cd\u4f5c\u304c\u983b\u7e41\u306b\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002JOIN\u64cd\u4f5c\u306f\u3001\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3084\u8907\u96d1\u306a\u30af\u30a8\u30ea\u306e\u5834\u5408\u306b\u51e6\u7406\u6642\u9593\u3092\u9577\u304f\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u304b\u304b\u308b\u8ca0\u62c5\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u3084\u64cd\u4f5c\uff08\u30af\u30a8\u30ea\uff09\u304c\u8907\u96d1\u306b\u306a\u308a\u3001\u958b\u767a\u8005\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3064\u3044\u3066\u6df1\u3044\u77e5\u8b58\u3092\u6301\u3064\u5fc5\u8981\u304c\u751f\u3058\u307e\u3059\u3002\u307e\u305f\u3001\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u975e\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3088\u308a\u3082\u8a2d\u8a08\u304c\u53b3\u5bc6\u306b\u306a\u308b\u305f\u3081\u3001\u7ba1\u7406\u3084\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3082\u8907\u96d1\u306b\u306a\u308a\u304c\u3061\u3067\u3059\u3002\u6b63\u898f\u5316\u306f\u300c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5c11\u3057\u843d\u3061\u3066\u3057\u307e\u3046\u3053\u3068\u3088\u308a\u3082\u3001\u30c7\u30fc\u30bf\u306e\u77db\u76fe\u304c\u306a\u3044\u72b6\u614b\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3084\u3001\u30c7\u30fc\u30bf\u306e\u5909\u66f4\u306b\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3053\u3068\u3092\u512a\u5148\u3059\u308b\u4f5c\u696d\u300d\u3068\u8a00\u3048\u307e\u3059\u3002\u3053\u306e\u8a00\u8449\u306f\u3001\u6b63\u898f\u5316\u304c\u3082\u305f\u3089\u3059\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3092\u8a8d\u8b58\u3057\u3064\u3064\u3082\u3001\u30c7\u30fc\u30bf\u306e\u54c1\u8cea\u3092\u6700\u512a\u5148\u3059\u308b\u8a2d\u8a08\u601d\u60f3\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\">\u975e\u6b63\u898f\u5316\u3068\u306f\uff1f\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/span><\/b>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u300c\u975e\u6b63\u898f\u5316\uff08Denormalization\uff09\u300d\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u3092\u4e0a\u3052\u308b\u305f\u3081\u306b\u3001\u610f\u56f3\u7684\u306b\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u8a31\u5bb9\u3057\u3001\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u3042\u3048\u3066\u5d29\u3059\u8a2d\u8a08\u624b\u6cd5\u3067\u3059\u3002\u975e\u6b63\u898f\u5316\u306f\u3001\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4e0a\u306b\u91cd\u8907\u3057\u305f\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3084\u633f\u5165\u306e\u901f\u5ea6\u306f\u9045\u304f\u306a\u308b\u4ee3\u308f\u308a\u306b\u3001\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u3092\u901f\u3081\u308b\u3053\u3068\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u975e\u6b63\u898f\u5316\u306e\u30e1\u30ea\u30c3\u30c8:<\/strong><\/span><\/b>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u8aad\u307f\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a:<\/strong> \u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u8a31\u5bb9\u3059\u308b\u3053\u3068\u3067\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u7d50\u5408\uff08JOIN\uff09\u306e\u56de\u6570\u3092\u6e1b\u3089\u3057\u3001\u30c7\u30fc\u30bf\u691c\u7d22\u306e\u5b9f\u884c\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u7279\u306b\u3001\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u96c6\u8a08\u7d50\u679c\u3084\u3001\u8907\u96d1\u306a\u7d50\u5408\u304c\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u3092\u4e00\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u307e\u3068\u3081\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51e6\u7406\u306e\u8ca0\u62c5\u3092\u8efd\u6e1b\u3067\u304d\u307e\u3059\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u30af\u30a8\u30ea\u306e\u5358\u7d14\u5316:<\/strong> \u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u306e\u60c5\u5831\u30921\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3067\u3001\u30af\u30a8\u30ea\u304c\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u308a\u3001\u958b\u767a\u306e\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/span><\/li>\r\n<\/ul>\r\n<b><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u975e\u6b63\u898f\u5316\u306e\u30c7\u30e1\u30ea\u30c3\u30c8:<\/strong><\/span><\/b>\r\n<ul>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u5897\u52a0:<\/strong> \u6700\u3082\u660e\u3089\u304b\u306a\u30c7\u30e1\u30ea\u30c3\u30c8\u3067\u3042\u308a\u3001\u540c\u3058\u30c7\u30fc\u30bf\u304c\u8907\u6570\u7b87\u6240\u306b\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u304c\u4f59\u5206\u306b\u5fc5\u8981\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u30c7\u30fc\u30bf\u4e0d\u6574\u5408\u306e\u30ea\u30b9\u30af:<\/strong> \u91cd\u8907\u3057\u305f\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\u66f4\u65b0\u3084\u524a\u9664\u306e\u969b\u306b\u3059\u3079\u3066\u306e\u91cd\u8907\u7b87\u6240\u3092\u6b63\u78ba\u306b\u4fee\u6b63\u3057\u306a\u3044\u3068\u3001\u30c7\u30fc\u30bf\u9593\u306b\u98df\u3044\u9055\u3044\uff08\u4e0d\u6574\u5408\uff09\u304c\u751f\u3058\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u66f4\u65b0\u6f0f\u308c\u306f\u6df1\u523b\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b3\u30b9\u30c8\u306e\u5897\u52a0:<\/strong> \u30c7\u30fc\u30bf\u306e\u8907\u96d1\u3055\u3068\u91cd\u8907\u304c\u5897\u3059\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4fdd\u5b88\u3084\u7ba1\u7406\u304c\u96e3\u3057\u304f\u306a\u308a\u3001\u30b3\u30b9\u30c8\u304c\u9ad8\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\r\n\t<li><span style=\"font-family: helvetica, arial, sans-serif\"><strong>\u633f\u5165\u30fb\u66f4\u65b0\u30b3\u30b9\u30c8\u306e\u5897\u52a0:<\/strong> \u30c7\u30fc\u30bf\u306e\u91cd\u8907\u306b\u3088\u308a\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u305f\u308a\u3001\u65e2\u5b58\u306e\u30c7\u30fc\u30bf\u3092\u66f4\u65b0\u3057\u305f\u308a\u3059\u308b\u969b\u306b\u8907\u6570\u306e\u7b87\u6240\u3092\u64cd\u4f5c\u3059\u308b\u5fc5\u8981\u304c\u751f\u3058\u3001\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\r\n<\/ul>\r\n<h1><span style=\"font-family: helvetica, arial, sans-serif\">\u3044\u3064\u975e\u6b63\u898f\u5316\u3092\u691c\u8a0e\u3059\u3079\u304d\u304b<\/span><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u3068\u975e\u6b63\u898f\u5316\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30c7\u30fc\u30bf\u306e\u77db\u76fe\u304c\u306a\u3044\u72b6\u614b\uff08\u6574\u5408\u6027\uff09\u306e\u9593\u3067\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u95a2\u4fc2\u306b\u3042\u308a\u307e\u3059\u3002\u6700\u9069\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u76ee\u7684\u3084\u5229\u7528\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u3053\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u9069\u5207\u306b\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u6b63\u898f\u5316\u3068\u975e\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u3068\u3001\u30c7\u30fc\u30bf\u306e\u66f8\u304d\u8fbc\u307f\u30fb\u66f4\u65b0\u6642\u306e\u77db\u76fe\u304c\u306a\u3044\u72b6\u614b\u3068\u3044\u3046\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306b\u304a\u3051\u308b\u6839\u672c\u7684\u306a\u9078\u629e\u3092\u8feb\u308a\u307e\u3059\u3002\u6b63\u898f\u5316\u306fJOIN\u304c\u5897\u3048\u308b\u3053\u3068\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u3092\u62db\u304f\u4e00\u65b9\u3001\u975e\u6b63\u898f\u5316\u306f\u8aad\u307f\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3082\u306e\u306e\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3068\u77db\u76fe\u306e\u30ea\u30b9\u30af\u3092\u4f34\u3044\u307e\u3059\u3002\u6700\u9069\u306a\u8a2d\u8a08\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5229\u7528\u72b6\u6cc1\uff08\u8aad\u307f\u8fbc\u307f\u304c\u591a\u3044\u304b\u3001\u66f8\u304d\u8fbc\u307f\u304c\u591a\u3044\u304b\uff09\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8981\u6027\u3001\u8a31\u5bb9\u3067\u304d\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30ec\u30d9\u30eb\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u975e\u6b63\u898f\u5316\u3092\u691c\u8a0e\u3059\u3079\u304d\u4e3b\u306a\u30b1\u30fc\u30b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u8aad\u307f\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6975\u3081\u3066\u91cd\u8996\u3055\u308c\u308b\u5834\u5408<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u8907\u96d1\u306aJOIN\u304c\u983b\u7e41\u306b\u767a\u751f\u3057\u3001\u305d\u308c\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u6bd4\u8f03\u7684\u5b89\u5b9a\u3057\u3066\u304a\u308a\u3001\u66f4\u65b0\u306e\u983b\u5ea6\u304c\u4f4e\u3044\u5834\u5408<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u30fb\u7279\u5b9a\u306e\u30ec\u30dd\u30fc\u30c8\u3084\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u306e\u305f\u3081\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u306a\u5834\u5408<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u305f\u3060\u3057\u3001\u975e\u6b63\u898f\u5316\u306f\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3078\u306e\u5f71\u97ff\u304c\u5927\u304d\u3044\u305f\u3081\u3001\u614e\u91cd\u306a\u5224\u65ad\u3068\u3001\u77db\u76fe\u3092\u9632\u3050\u305f\u3081\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u306e\u53b3\u5bc6\u306a\u5236\u5fa1\u304c\u5fc5\u8981\u3067\u3059\u3002<\/span><\/p>\r\n<h1><\/h1>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">RDB\u306e\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u77db\u76fe\u304c\u306a\u3044\u72b6\u614b\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u975e\u5e38\u306b\u91cd\u8981\u306a\u8a2d\u8a08\u624b\u6cd5\u3067\u3059\u3002\u7b2c\u4e00\u6b63\u898f\u5f62\u304b\u3089\u30dc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\u306b\u81f3\u308b\u5404\u6bb5\u968e\u306f\u3001\u7279\u5b9a\u306e\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u4f53\u7cfb\u7684\u306b\u6392\u9664\u3057\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u3068\u52b9\u7387\u7684\u306a\u7ba1\u7406\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3057\u304b\u3057\u3001\u6b63\u898f\u5316\u3057\u3059\u304e\u308b\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u5206\u5272\u306b\u3088\u308bJOIN\u306e\u5897\u52a0\u3092\u62db\u304d\u3001\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u3084\u64cd\u4f5c\u304c\u8907\u96d1\u306b\u306a\u3063\u305f\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u975e\u6b63\u898f\u5316\u306f\u3001\u7279\u5b9a\u306e\u8aad\u307f\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306e\u6709\u52b9\u306a\u624b\u6bb5\u3067\u3059\u304c\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u5897\u52a0\u3068\u305d\u308c\u306b\u4f34\u3046\u77db\u76fe\u30ea\u30b9\u30af\u306e\u7ba1\u7406\u3068\u3044\u3046\u8ab2\u984c\u3092\u4f34\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3069\u306e\u6b63\u898f\u5f62\u307e\u3067\u9069\u7528\u3059\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u975e\u6b63\u898f\u5316\u3092\u5c0e\u5165\u3059\u308b\u304b\u306f\u3001\u696d\u52d9\u306e\u76ee\u7684\u3001\u30c7\u30fc\u30bf\u306e\u7279\u6027\u3001\u4e88\u7b97\u3001\u305d\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u306e\u5229\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u7dcf\u5408\u7684\u306b\u5224\u65ad\u3057\u3066\u6c7a\u5b9a\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002<\/span><\/p>\n\n<h2>\u307e\u3068\u3081\uff1a\u6700\u9069\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u305f\u3081\u306b<\/h2>\n<p><span style=\"font-family: helvetica, arial, sans-serif\">RDB\u306e\u6b63\u898f\u5316\u306f\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u77db\u76fe\u304c\u306a\u3044\u72b6\u614b\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u975e\u5e38\u306b\u91cd\u8981\u306a\u8a2d\u8a08\u624b\u6cd5\u3067\u3059\u3002\u7b2c\u4e00\u6b63\u898f\u5f62\u304b\u3089\u30dc\u30a4\u30b9\u30fb\u30b3\u30c3\u30c9\u6b63\u898f\u5f62\u306b\u81f3\u308b\u5404\u6bb5\u968e\u306f\u3001\u7279\u5b9a\u306e\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u4f53\u7cfb\u7684\u306b\u6392\u9664\u3057\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u3068\u52b9\u7387\u7684\u306a\u7ba1\u7406\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/span><\/p>\r\n<p><span style=\"font-family: helvetica, arial, sans-serif\">\u3057\u304b\u3057\u3001\u6b63\u898f\u5316\u3057\u3059\u304e\u308b\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u5206\u5272\u306b\u3088\u308bJOIN\u306e\u5897\u52a0\u3092\u62db\u304d\u3001\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u3084\u64cd\u4f5c\u304c\u8907\u96d1\u306b\u306a\u3063\u305f\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u975e\u6b63\u898f\u5316\u306f\u3001\u7279\u5b9a\u306e\u8aad\u307f\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u305f\u3081\u306e\u6709\u52b9\u306a\u624b\u6bb5\u3067\u3059\u304c\u3001\u30c7\u30fc\u30bf\u306e\u91cd\u8907\u5897\u52a0\u3068\u305d\u308c\u306b\u4f34\u3046\u77db\u76fe\u30ea\u30b9\u30af\u306e\u7ba1\u7406\u3068\u3044\u3046\u8ab2\u984c\u3092\u4f34\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3069\u306e\u6b63\u898f\u5f62\u307e\u3067\u9069\u7528\u3059\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u975e\u6b63\u898f\u5316\u3092\u5c0e\u5165\u3059\u308b\u304b\u306f\u3001\u696d\u52d9\u306e\u76ee\u7684\u3001\u30c7\u30fc\u30bf\u306e\u7279\u6027\u3001\u4e88\u7b97\u3001\u305d\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u306e\u5229\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u7dcf\u5408\u7684\u306b\u5224\u65ad\u3057\u3066\u6c7a\u5b9a\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002<\/span><span 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