{"id":4862,"date":"2024-04-12T21:44:39","date_gmt":"2024-04-12T12:44:39","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=4862"},"modified":"2024-04-12T21:44:39","modified_gmt":"2024-04-12T12:44:39","slug":"%e3%80%90sql%e3%80%91%e7%b4%af%e8%a8%88%e3%82%92%e8%a8%88%e7%ae%97%e3%81%97%e3%80%81null%e3%81%ae%e5%a0%b4%e5%90%88%e3%81%af%e5%89%8d%e3%81%ae%e8%a1%8c%e3%81%ae%e5%80%a4%e3%81%a7%e5%9f%8b%e3%82%81","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/%e3%80%90sql%e3%80%91%e7%b4%af%e8%a8%88%e3%82%92%e8%a8%88%e7%ae%97%e3%81%97%e3%80%81null%e3%81%ae%e5%a0%b4%e5%90%88%e3%81%af%e5%89%8d%e3%81%ae%e8%a1%8c%e3%81%ae%e5%80%a4%e3%81%a7%e5%9f%8b%e3%82%81\/","title":{"rendered":"\u3010SQL\u3011\u7d2f\u8a08\u3092\u8a08\u7b97\u3057\u3001NULL\u306e\u5834\u5408\u306f\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u308b\u65b9\u6cd5"},"content":{"rendered":"\n

\u3010SQL\u3011\u7d2f\u8a08\u3092\u8a08\u7b97\u3057\u3001NULL\u306e\u5834\u5408\u306f\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n

\u306f\u3058\u3081\u306b<\/h2>\n

\"\"<\/p>\r\n

count_y\u3092\u7d2f\u8a08\u3057\u305fover_y\u5217\u306bNULL\u304c\u5165\u3063\u3066\u3044\u308b\u6642\u306b\u3001\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c\u3057\u305f\u3044\uff01\u3068\u601d\u3044\u307e\u3059\u306d\u3002\u305d\u306e\u89e3\u6c7a\u7b56\u306e\u5099\u5fd8\u9332\u3067\u3059\u3002<\/p>\r\n

NULL\u306e\u5834\u5408\u306b\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c\u3059\u308b\u65b9\u6cd5\u3001\u305d\u306e\u4e21\u65b9\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\r\n

\u65b9\u6cd5\u306f\uff12\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002<\/p>\n\n

\u65b9\u6cd5\u2460\u3082\u3046\u4e00\u56deOVER\u53e5\u3067\u7d2f\u8a08\u3092\u8a08\u7b97<\/h2>\n

\u307e\u305a\u6700\u521d\u306b\u7d39\u4ecb\u3059\u308b\u65b9\u6cd5\u306f\u3001\u518d\u5ea6OVER\u53e5\u3092\u4f7f\u7528\u3057\u3066\u7d2f\u7a4d\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306eSQL\u30af\u30a8\u30ea\u3092\u4f7f\u7528\u3057\u3066\u3001NULL\u5024\u3092\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n

\r\n
SUM(count_y) OVER (ORDER BY date) as over_over_y<\/code><\/pre>\r\n<\/div>\r\n
\u3053\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001SUM(count_y) OVER (ORDER BY date)<\/span>\u3092\u4f7f\u7528\u3057\u3066\u5404\u884c\u306b\u5bfe\u3059\u308b\u7d2f\u7a4d\u3092\u8a08\u7b97\u3057\u3066\u3044\u307e\u3059\u3002NULL\u5024\u304c\u3042\u3063\u3066\u3082\u3001\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c\u3055\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u9023\u7d9a\u6027\u304c\u7dad\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\r\n
\"\"<\/p>\n\n
\u65b9\u6cd5\u2461LAST_VALUE\u95a2\u6570\u3092\u7528\u3044\u3066\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c<\/h2>\n
\u3082\u3046\u4e00\u3064\u306e\u65b9\u6cd5\u306f\u3001LAST_VALUE\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066NULL\u5024\u3092\u88dc\u5b8c\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306eSQL\u30af\u30a8\u30ea\u3092\u4f7f\u7528\u3057\u3066\u3001\u524d\u306e\u884c\u306e\u5024\u3067NULL\u5024\u3092\u88dc\u5b8c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n
\r\n
LAST_VALUE(over_y IGNORE NULLS) OVER (ORDER BY date) as last_value_over_y<\/code><\/pre>\r\n<\/div>\r\n
\u3053\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001LAST_VALUE(over_y IGNORE NULLS) OVER (ORDER BY date)\u3092\u4f7f\u7528\u3057\u3066\u3001NULL\u5024\u3092\u7121\u8996\u3057\u3066\u524d\u306e\u884c\u306e\u5024\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001NULL\u5024\u304c\u3042\u308b\u5834\u5408\u3067\u3082\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\r\n
\"\"<\/p>\r\n
<\/p>\n\n
\u307e\u3068\u3081<\/h2>\n
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001SQL\u3092\u4f7f\u7528\u3057\u3066NULL\u5024\u3092\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u30012\u3064\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u30c7\u30fc\u30bf\u89e3\u6790\u3084\u30ec\u30dd\u30fc\u30c8\u4f5c\u6210\u306b\u304a\u3044\u3066\u3001\u30c7\u30fc\u30bf\u306e\u9023\u7d9a\u6027\u3092\u4fdd\u3064\u305f\u3081\u306b\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\r\n
\uff11\uff0e\u518d\u5ea6OVER\u53e5\u3092\u4f7f\u7528\u3057\u3066\u7d2f\u7a4d\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5<\/strong>:<\/p>\r\n
\u30fbSUM(count_y) OVER (ORDER BY date)\u3092\u4f7f\u7528\u3057\u3066\u3001\u7d2f\u7a4d\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\r\n
\u30fbNULL\u5024\u304c\u3042\u3063\u3066\u3082\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c\u3055\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u9023\u7d9a\u6027\u304c\u7dad\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\r\n
\uff12\uff0eLAST_VALUE\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u88dc\u5b8c\u3059\u308b\u65b9\u6cd5<\/strong>:<\/p>\r\n
\u30fbLAST_VALUE(over_y IGNORE NULLS) OVER (ORDER BY date)\u3092\u4f7f\u7528\u3057\u3066\u3001\u524d\u306e\u884c\u306e\u5024\u3067NULL\u5024\u3092\u88dc\u5b8c\u3057\u307e\u3059\u3002<\/p>\r\n
\u30fbNULL\u5024\u304c\u3042\u308b\u5834\u5408\u3067\u3082\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u3089\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u9023\u7d9a\u6027\u304c\u7dad\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\r\n
\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001SQL\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n
<\/p>","protected":false},"excerpt":{"rendered":"
\u3010SQL\u3011\u7d2f\u8a08\u3092\u8a08\u7b97\u3057\u3001NULL\u306e\u5834\u5408\u306f\u524d\u306e\u884c\u306e\u5024\u3067\u57cb\u3081\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002 \u306f\u3058\u3081\u306b count_y\u3092\u7d2f\u8a08\u3057\u305fover_y\u5217\u306bNULL\u304c\u5165\u3063\u3066\u3044\u308b\u6642\u306b\u3001\u524d\u306e\u884c\u306e\u5024\u3067\u88dc\u5b8c\u3057\u305f\u3044\uff01\u3068\u601d\u3044\u307e\u3059\u306d\u3002\u305d\u306e\u89e3\u6c7a\u7b56\u306e\u5099\u5fd8\u9332\u3067\u3059\u3002 N […]<\/p>\n","protected":false},"author":83,"featured_media":3651,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","swell_btn_cv_data":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[1246],"tags":[148],"class_list":["post-4862","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-infrastructure","tag-sql"],"_links":{"self":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/4862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/users\/83"}],"replies":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/comments?post=4862"}],"version-history":[{"count":0,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/4862\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media\/3651"}],"wp:attachment":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media?parent=4862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/categories?post=4862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/tags?post=4862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}