{"id":5400,"date":"2024-10-28T21:00:44","date_gmt":"2024-10-28T12:00:44","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=5400"},"modified":"2025-12-19T12:43:36","modified_gmt":"2025-12-19T03:43:36","slug":"sql-case","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/sql-case","title":{"rendered":"\u3010SQL\u3011CASE\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u5206\u5c90\u3059\u308b\u65b9\u6cd5\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac"},"content":{"rendered":"<p>SQL\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3059\u308b\u3068\u304d\u3001\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u306e\u5024\u306b\u5fdc\u3058\u3066\u6761\u4ef6\u5206\u5c90\u51e6\u7406\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff09\u65b0\u305f\u306a\u30ab\u30e9\u30e0\u300c<strong><span>judge<\/span><\/strong>\u300d\u3092\u4f5c\u3063\u3066\u300c<strong><span>score<\/span><\/strong>\u300d\u306e\u5024\u306b\u5fdc\u3058\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5224\u5b9a\u3092\u3057\u305f\u3044\u3002<\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: 120px;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>score<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\"><strong>judge<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">100<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5408\u683c\uff08\u6e80\u70b9\uff09<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">50\u70b9\u4ee5\u4e0a<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5408\u683c<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">49\u70b9\u4ee5\u4e0b<\/td>\n<td style=\"width: 50%; height: 24px;\">\u88dc\u7fd2<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">NULL<\/td>\n<td style=\"width: 50%; height: 24px;\">\u672a\u5224\u5b9a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u300c<span>CASE<\/span>\u300d\u5f0f\u3092\u4f7f\u3063\u3066\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u3067\u306f\u300c<span>CASE<\/span>\u300d\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u203b\u30b3\u30fc\u30c9\u306e\u307f\u53c2\u7167\u3057\u305f\u3044\u65b9\u306f\u300c<span>3-2 <\/span>\u691c\u7d22<span>CASE<\/span>\u5f0f\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u300d\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#SQLCASE\">\uff11\uff0eSQL\u306eCASE\u5f0f\u3068\u306f\u3000\u301c\u4f7f\u3044\u3069\u3053\u308d\u301c<\/a><\/li><li><a href=\"#SQL_CASE\">\uff12\uff0eSQL CASE\u5f0f\u306e\u69cb\u6587<\/a><\/li><li><a href=\"#i\">\uff13\uff0e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/a><ul><li><a href=\"#-CASECASE\">\uff13-\uff11\uff0e\u5358\u7d14CASE\u5f0f\u3068\u691c\u7d22CASE\u5f0f<\/a><\/li><li><a href=\"#-CASE\">\uff13-\uff12\uff0e\u691c\u7d22CASE\u5f0f\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/a><\/li><\/ul><\/li><li><a href=\"#IF\">\uff14\uff0eIF\u6587\u3068\u306e\u4f7f\u3044\u5206\u3051\u306b\u3064\u3044\u3066<\/a><\/li><li><a href=\"#CASE\">\uff15\uff0eCASE\u5f0f\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9<\/a><\/li><li><a href=\"#i-2\">\uff16\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"SQLCASE\">\uff11\uff0eSQL\u306eCASE\u5f0f\u3068\u306f\u3000\u301c\u4f7f\u3044\u3069\u3053\u308d\u301c<\/span><\/h2>\n<p>\u7c21\u5358\u306b\u3044\u3048\u3070\u6761\u4ef6\u5206\u5c90\u304c\u3067\u304d\u307e\u3059\u3002CASE\u5f0f\u306f\u69cb\u6587\u3092\u899a\u3048\u308c\u3070\u7c21\u5358\u306b\u8a18\u8ff0\u3067\u304d\u3001\u69d8\u3005\u306a\u5fdc\u7528\u304c\u53ef\u80fd\u3067\u3059\u3002SELECT\u6587\u3001<span>UPDATE<\/span>\u6587\u306a\u3069\u69d8\u3005\u306a<span>SQL<\/span>\u30af\u30a8\u30ea\u306e\u4e2d\u3067\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h2><span id=\"SQL_CASE\"><span>\uff12\uff0eSQL CASE<\/span>\u5f0f\u306e\u69cb\u6587<\/span><\/h2>\n<p>CASE\u5f0f\u306b\u306f\u300c\u5358\u7d14<span>CASE<\/span>\u5f0f\u300d\u3068\u300c\u691c\u7d22<span>CASE<\/span>\u5f0f\u300d\u304c\u3042\u308a\u3001\u8a18\u8ff0\u65b9\u6cd5\u304c\u5c11\u3057\u7570\u306a\u308a\u307e\u3059\u3002\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002\u5177\u4f53\u4f8b\u306b\u3064\u3044\u3066\u306f\u6b21\u7ae0\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p><span class=\"f-marker-w\">###&#8211;###&#8211;###\u00a0 \u3000\u5358\u7d14<span>CASE<\/span>\u5f0f\u306e\u69cb\u6587\u3000 <span>\u00a0###&#8211;###&#8211;###<\/span><\/span><span><\/span><\/p>\n<p>\u6307\u5b9a\u3057\u305f\u30ab\u30e9\u30e0\u306e\u5024\uff08\u6761\u4ef6\uff09\u306b\u57fa\u3065\u304d\u3001\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002\uff1c\u6761\u4ef6<span>A<\/span>\u3000\u304c\u3000\u7d50\u679c<span>A<\/span>\u3000\u3060\u3063\u305f\u3089\u30fb\u30fb\uff1e\u3068\u3044\u3046\u3088\u3046\u306b\u691c\u7d22\u6761\u4ef6\u306f\u30a4\u30b3\u30fc\u30eb\u306e\u307f\u3067\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">CASE [\u691c\u7d22\u5bfe\u8c61\u306e\u30ab\u30e9\u30e0\u540d]\r\nWHEN [\u6761\u4ef6A] THEN [\u7d50\u679cA]\r\nWHEN [\u6761\u4ef6B] THEN [\u7d50\u679cB]\r\nELSE [\u7d50\u679cC\uff08\u6761\u4ef6A\u30fb\u6761\u4ef6B\u306b\u8a72\u5f53\u3057\u306a\u3044\u6642\uff09]\r\nEND<\/pre>\n<p><span class=\"f-marker-w\">###&#8211;###&#8211;###\u00a0 \u3000\u691c\u7d22<span>CASE<\/span>\u5f0f\u306e\u69cb\u6587\u3000 <span>\u00a0###&#8211;###&#8211;###<\/span><\/span><span><\/span><\/p>\n<p>\u691c\u7d22<span>CASE<\/span>\u5f0f\u3067\u306f\u6761\u4ef6\u5f0f\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30a4\u30b3\u30fc\u30eb\u4ee5\u5916\u306b\u3082\u4e0d\u7b49\u53f7\u3084<span>NULL<\/span>\u5024\u306e\u8a55\u4fa1\u306a\u3069\u3082\u53ef\u80fd\u3067\u3001\u5358\u7d14<span>CASE<\/span>\u5f0f\u3088\u308a\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">CASE \r\nWHEN [\u691c\u7d22\u5bfe\u8c61\u30ab\u30e9\u30e0\u540d] = [\u691c\u7d22\u6761\u4ef6A] THEN [\u7d50\u679cA]\r\nWHEN [\u691c\u7d22\u5bfe\u8c61\u30ab\u30e9\u30e0\u540d] = [\u691c\u7d22\u6761\u4ef6B] THEN [\u7d50\u679cB]\r\nELSE [\u7d50\u679cC\uff08\u6761\u4ef6A\u30fb\u6761\u4ef6B\u306b\u8a72\u5f53\u3057\u306a\u3044\u6642\uff09]\r\nEND<\/pre>\n<h2><span id=\"i\">\uff13\uff0e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/span><\/h2>\n<p>\u3067\u306f\u5b9f\u969b\u306b\u5358\u7d14\u30b1\u30fc\u30b9\u5f0f\u3068\u691c\u7d22\u30b1\u30fc\u30b9\u5f0f\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span id=\"-CASECASE\">\uff13-\uff11\uff0e\u5358\u7d14<span>CASE<\/span>\u5f0f\u3068\u691c\u7d22<span>CASE<\/span>\u5f0f<\/span><\/h3>\n<p>\u691c\u7d22\u5bfe\u8c61\u306e\u30ab\u30e9\u30e0\u304c\u691c\u7d22\u6761\u4ef6\u3068\u300c\u30a4\u30b3\u30fc\u30eb\u300d\u3067\u3042\u308b\u304b\u3092\u5224\u5b9a\u3059\u308b\u30b1\u30fc\u30b9\u3067\u306f\u5358\u7d14\u30b1\u30fc\u30b9\u5f0f\u304c\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3063\u3066\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\uff0b\uff0b \u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb \uff0b\uff0b <span>table<\/span>\u540d\uff1a<span>flower<br \/>\n<\/span>+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+<br \/>\n| name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | color\u00a0 | quantity | price |<br \/>\n+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+<br \/>\n| \u30c1\u30e5\u30fc\u30ea\u30c3\u30d7<span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | Red\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 50 |\u00a0\u00a0 250 |<br \/>\n<\/span>| \u30d0\u30e9<span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | White\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 26 |\u00a0\u00a0 400 |<br \/>\n<\/span>| \u30e6\u30ea<span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | White\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 22 |\u00a0\u00a0 350 |<br \/>\n<\/span>| \u3072\u307e\u308f\u308a<span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | yellow |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 10 |\u00a0\u00a0 300 |<br \/>\n<\/span>+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306a\u6761\u4ef6\u3067<span>SQL<\/span>\u6587\u3092\u8a18\u8ff0\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u30ab\u30e9\u30e0\u300c<span>color<\/span>\u300d\u306e\u5024\u304c\u300c<span>Red<\/span>\u300d\u306a\u3089\u300c\u8d64\u300d\u3092\u8fd4\u3059<br \/>\n\u30ab\u30e9\u30e0\u300c<span>color<\/span>\u300d\u306e\u5024\u304c\u300c<span>White<\/span>\u300d\u306a\u3089\u300c\u767d\u300d\u3092\u8fd4\u3059<br \/>\n\u30ab\u30e9\u30e0\u300c<span>color<\/span>\u300d\u306e\u5024\u304c \u305d\u308c\u4ee5\u5916 \u306a\u3089\u300c\u305d\u306e\u4ed6\u300d\u3092\u8fd4\u3059<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u25c6\u5358\u7d14CASE\u5f0f\u306e\u5834\u5408\r\n    CASE color\r\n        WHEN 'red' THEN '\u8d64'\r\n        WHEN 'white' THEN '\u767d'\r\n        ELSE '\u305d\u306e\u4ed6' \r\n    END as \u8272\r\n\r\n\u25c6\u691c\u7d22CASE\u5f0f\u306e\u5834\u5408\r\n    CASE\r\n        WHEN color = 'red' THEN '\u8d64'\r\n        WHEN color = 'white' THEN '\u767d'\r\n        ELSE '\u305d\u306e\u4ed6' \r\n    END as \u8272<\/pre>\n<p>\uff0b\uff0b \u5b9f\u884c\u7d50\u679c \uff0b\uff0b<br \/>\n+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8211;+<br \/>\n| name | color | quantity | price | \u8272 |<br \/>\n+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8211;+<br \/>\n| \u30c1\u30e5\u30fc\u30ea\u30c3\u30d7 | Red | 50 | 250 | \u8d64 |<br \/>\n| \u30d0\u30e9 | White | 26 | 400 | \u767d |<br \/>\n| \u30e6\u30ea | White | 22 | 350 | \u767d |<br \/>\n| \u3072\u307e\u308f\u308a | yellow | 10 | 300 | \u305d\u306e\u4ed6 |<br \/>\n+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;&#8211;+&#8212;&#8212;&#8212;-+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8211;+<\/p>\n<p>\u4e0a\u8a18\uff12\u3064\u306e\u30af\u30a8\u30ea\u306f\u540c\u3058\u610f\u5473\u3001\u540c\u3058\u7d50\u679c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3><span id=\"-CASE\">\uff13-\uff12\uff0e\u691c\u7d22<span>CASE<\/span>\u5f0f\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/span><\/h3>\n<p>\u691c\u7d22<span>CASE<\/span>\u5f0f\u306e\u66f8\u304d\u65b9\u3092\u3082\u3046\u5c11\u3057\u898b\u3066\u3044\u304d\u307e\u3059\u3002\u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb\u300c<span>seiseki<\/span>\u300d\u3092\u5229\u7528\u3057\u3066\u6b21\u306e\u3088\u3046\u306a\u5224\u5b9a\u3092\u3059\u308b\u30af\u30a8\u30ea\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\uff09\u65b0\u305f\u306a\u30ab\u30e9\u30e0\u300c<strong><span>judge<\/span><\/strong>\u300d\u3092\u4f5c\u3063\u3066\u300c<strong><span>score<\/span><\/strong>\u300d\u306e\u5024\u306b\u5fdc\u3058\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5224\u5b9a\u3092\u3057\u305f\u3044\u3002<\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: 120px;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>score<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\"><strong>judge<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">100<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5408\u683c\uff08\u6e80\u70b9\uff09<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">50\u70b9\u4ee5\u4e0a<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5408\u683c<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">49\u70b9\u4ee5\u4e0b<\/td>\n<td style=\"width: 50%; height: 24px;\">\u88dc\u7fd2<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">NULL<\/td>\n<td style=\"width: 50%; height: 24px;\">\u672a\u5224\u5b9a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\uff0b\uff0b \u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb \uff0b\uff0b table\u540d\uff1aseiseki<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8211;+<br \/>\n| ID | name | score | bikou |<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8211;+<br \/>\n| 1 | \u6625\u7530\u3055\u304f\u3089 | 100 | NULL |<br \/>\n| 2 | \u590f\u6728\u6d77\u6597 | NULL | \u6b20\u5e2d |<br \/>\n| 3 | \u79cb\u5c71\u308a\u3093\u3054 | 85 | NULL |<br \/>\n| 4 | \u51ac\u4e0b\u96ea\u5f66 | 18 | NULL |<br \/>\n| 5 | \u6885\u96e8\u5ddd\u3042\u3081 | 96 | NULL |<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8211;+<\/p>\n<p>\u30a4\u30b3\u30fc\u30eb\u306e\u307f\u3067\u306f\u6761\u4ef6\u5224\u5b9a\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u691c\u7d22<span>CASE<\/span>\u5f0f\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">SELECT\r\n    ID\r\n    ,name\r\n    ,score\r\n    ,CASE \r\n        WHEN score = 100 THEN '\u5408\u683c\uff08\u6e80\u70b9\uff09'\r\n        WHEN score &gt;= 50 THEN '\u5408\u683c'\r\n        WHEN score &gt; 0 THEN '\u88dc\u7fd2'\r\n        ELSE '\u672a\u5224\u5b9a'\r\n    END as judge\r\nFROM seiseki<\/pre>\n<p>\uff0b\uff0b \u5b9f\u884c\u7d50\u679c \uff0b\uff0b<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+<br \/>\n| ID | name | score | judge |<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+<br \/>\n| 1 | \u6625\u7530\u3055\u304f\u3089 | 100 | \u5408\u683c\uff08\u6e80\u70b9\uff09 |<br \/>\n| 2 | \u590f\u6728\u6d77\u6597 | NULL | \u672a\u5224\u5b9a |<br \/>\n| 3 | \u79cb\u5c71\u308a\u3093\u3054 | 85 | \u5408\u683c |<br \/>\n| 4 | \u51ac\u4e0b\u96ea\u5f66 | 18 | \u88dc\u7fd2 |<br \/>\n| 5 | \u6885\u96e8\u5ddd\u3042\u3081 | 96 | \u5408\u683c |<br \/>\n| 6 | \u9752\u6728\u6625\u5b50 | 50 | \u5408\u683c |<br \/>\n| 7 | \u6e21\u8fba\u306a\u3064 | 49 | \u88dc\u7fd2 |<br \/>\n| 8 | \u7530\u4e2d\u79cb\u751f | 99 | \u5408\u683c |<br \/>\n+&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+&#8212;&#8212;-+&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+<\/p>\n<h2><span id=\"IF\">\uff14\uff0eIF\u6587\u3068\u306e\u4f7f\u3044\u5206\u3051\u306b\u3064\u3044\u3066<\/span><\/h2>\n<p>IF\u6587\uff08<span>SQLServer<\/span>\u3067\u306f\u300c<span>IIF<\/span>\u300d\uff09\u3067\u306f\u3001\u6761\u4ef6\u3092\u30cd\u30b9\u30c8\uff08\u5165\u308c\u5b50\u306b\uff09\u3059\u308b\u3068\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u304c\u3001\u5358\u7d14\u306a\u5206\u5c90\u3067\u3042\u308c\u3070<span>IF<\/span>\u6587\u306e\u65b9\u304c\u8aad\u307f\u3084\u3059\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9<span>CASE<\/span>\u6587\u306f<span>SELECT<\/span>\u30fb<span>UPDATE<\/span>\u30fb<span>DELETE<\/span>\u30fb<span>SET<\/span>\u30fb<span>IN<\/span>\u30fb<span>WHERE<\/span>\u306a\u3069\u69d8\u3005\u306a\u53e5\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u4e00\u6982\u306b\u3069\u3061\u3089\u304c\u826f\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><span id=\"CASE\">\uff15\uff0eCASE\u5f0f\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9<\/span><\/h2>\n<p>CASE\u5f0f\u3092\u4f7f\u3046\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u982d\u306b\u5165\u308c\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li><span>WHEN<\/span>\u53e5\u306f\u300c\u771f\u300d\u306b\u306a\u308b\u6761\u4ef6\u304c\u898b\u3064\u304b\u3063\u305f\u3089\u4ee5\u964d\u306e<span>WHEN<\/span>\u53e5\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044<\/li>\n<li>\u6761\u4ef6\u306f\u6392\u4ed6\u7684\u306b\u8a18\u8ff0\u3059\u308b<\/li>\n<li>\u300c<span>ELSE<\/span>\u300d\u306f\u7701\u7565\u53ef\u80fd\u3060\u304c\u3001\u4e88\u671f\u3057\u306a\u3044\u7d50\u679c\u3068\u306a\u308b\u3053\u3068\u9632\u3050\u305f\u3081\u8a18\u8ff0\u3057\u305f\u65b9\u304c\u826f\u3044<\/li>\n<li>\u30c7\u30fc\u30bf\u306b\u300c<span>NULL<\/span>\u300d\u5024\u3092\u542b\u3080\u5834\u5408\u3001\u60f3\u5b9a\u3057\u306a\u3044\u7d50\u679c\u3068\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<li>\u300c<span>IS NULL<\/span>\u300d\u7b49\u3092\u5229\u7528\u3057\u3066\u6b63\u3057\u304f\u8a55\u4fa1\u3055\u308c\u308b\u3088\u3046\u306b\u7559\u610f\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2><span id=\"i-2\">\uff16\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>CASE\u5f0f\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u521d\u5fc3\u8005\u5411\u3051\u306b\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u6163\u308c\u308c\u3070\u3068\u3066\u3082\u5fdc\u7528\u304c\u52b9\u304d\u307e\u3059\u306e\u3067\u3001\u69d8\u3005\u306a\u6761\u4ef6\u3067\u8a66\u3057\u3066\u307f\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3068\u601d\u3044\u307e\u3059\u3002\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n<blockquote>\n<p>\u3010\u52d5\u4f5c\u691c\u8a3c<span>DB<\/span>\u3011<\/p>\n<p>mySQL 8.0.39<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u53c2\u8003\u30b5\u30a4\u30c8\u3011<\/p>\n<p><span><a href=\"https:\/\/learn.microsoft.com\/ja-jp\/sql\/t-sql\/language-elements\/case-transact-sql?view=sql-server-ver16\" target=\"_blank\" rel=\"noopener\">https:\/\/learn.microsoft.com\/ja-jp\/sql\/t-sql\/language-elements\/case-transact-sql?view=sql-server-ver16<\/a><\/span><\/p>\n<p><a href=\"https:\/\/learn.microsoft.com\/ja-jp\/sql\/t-sql\/functions\/logical-functions-iif-transact-sql?view=sql-server-ver16\" target=\"_blank\" rel=\"noopener\">https:\/\/learn.microsoft.com\/ja-jp\/sql\/t-sql\/functions\/logical-functions-iif-transact-sql?view=sql-server-ver16<\/a><\/p>\n<p><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/case.html\" target=\"_blank\" rel=\"noopener\" class=\"broken_link\">https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/case.html<\/a><\/p>\n<p><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/if.html\" target=\"_blank\" rel=\"noopener\" class=\"broken_link\">https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/if.html<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>SQL\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3059\u308b\u3068\u304d\u3001\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u306e\u5024\u306b\u5fdc\u3058\u3066\u6761\u4ef6\u5206\u5c90\u51e6\u7406\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u4f8b\uff09\u65b0\u305f\u306a\u30ab\u30e9\u30e0\u300cjudge\u300d\u3092\u4f5c\u3063\u3066\u300cscore\u300d\u306e\u5024\u306b\u5fdc\u3058\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5224\u5b9a\u3092\u3057\u305f\u3044\u3002 score judge 100 [&hellip;]<\/p>\n","protected":false},"author":28,"featured_media":5401,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/5400"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=5400"}],"version-history":[{"count":4,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/5400\/revisions"}],"predecessor-version":[{"id":6267,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/5400\/revisions\/6267"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/5401"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=5400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=5400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}