{"id":4736,"date":"2018-06-21T10:58:58","date_gmt":"2018-06-21T01:58:58","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=4736"},"modified":"2023-05-27T23:19:12","modified_gmt":"2023-05-27T14:19:12","slug":"%e3%80%90sql%e3%80%91%e3%80%8c%e7%9b%b8%e9%96%a2%e3%82%b5%e3%83%96%e3%82%af%e3%82%a8%e3%83%aa%e3%80%8d%e3%81%a8%e3%81%af%e4%bd%95%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=4736","title":{"rendered":"\u3010SQL\u3011\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u3068\u306f\u4f55\u304b\uff1f\u3001\u7d50\u5408\u3068\u306e\u4f7f\u3044\u5206\u3051\u306a\u3069\u3082"},"content":{"rendered":"<h2>\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u3068\u306f\u4f55\u304b\uff1f<\/h2>\n<p>\u8907\u6570\u884c\u5024\u304c\u8fd4\u3063\u3066\u6765\u308b\u3088\u3046\u306a\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u4f5c\u6210\u3057\u305f\u5834\u5408\u306b\u3001<span style=\"color: #ff0000;\"><strong>\u30c6\u30fc\u30d6\u30eb\u306e\u3042\u308b\u7279\u5b9a\u90e8\u5206\u306b\u5bfe\u8c61\u3092\u7d5e\u308b\u3053\u3068\u3067\u3001WHERE\u53e5\u3067\u8ff0\u8a9e\uff08=\u3001&lt;\u3001&gt;\u3001EXISTS\u7b49\uff09\u3092\u4f7f\u3063\u3066\u6bd4\u8f03\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u76ee\u7684<\/strong><\/span>\u3067\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u672c\u6765\u3001\u30b5\u30d6\u30af\u30a8\u30ea\u306f\u3001<span style=\"color: #ff0000;\"><strong>\u300c\u30b9\u30ab\u30e9\u30fb\u30b5\u30d6\u30af\u30a8\u30ea\u300d\uff08\u5358\u4e00\u5217\u3001\u5358\u4e00\u884c\u304c\u8fd4\u3063\u3066\u6765\u308b\u30b5\u30d6\u30af\u30a8\u30ea\uff09\u306b\u3057\u306a\u3044\u9650\u308a\u306f\u3001\u8ff0\u8a9e\uff08=\u3001&lt;\u3001&gt;\u3001EXISTS\u7b49\uff09\u306f\u4f7f\u3048\u306a\u304b\u3063\u305f\u3067\u3059\u304c\u3001\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u4f7f\u3048\u3070\u8ff0\u8a9e\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/strong><\/span><\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"w8YCqTMDoG\"><p><a href=\"http:\/\/www.code-magagine.com\/?p=4747\">\u3010SQL\u3011\u300c\u30b5\u30d6\u30af\u30a8\u30ea(\u526f\u554f\u3044\u5408\u308f\u305b)\u300d\u306b\u3064\u3044\u3066<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" src=\"http:\/\/www.code-magagine.com\/?p=4747&#038;embed=true#?secret=w8YCqTMDoG\" data-secret=\"w8YCqTMDoG\" width=\"500\" height=\"282\" title=\"&#8220;\u3010SQL\u3011\u300c\u30b5\u30d6\u30af\u30a8\u30ea(\u526f\u554f\u3044\u5408\u308f\u305b)\u300d\u306b\u3064\u3044\u3066&#8221; &#8212; \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30de\u30ac\u30b8\u30f3\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30b5\u30d6\u30af\u30a8\u30ea\u306f<span style=\"color: #ff0000;\"><strong>\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d<\/strong><\/span>\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">SELECT * FROM USER_MASTER A\r\nWHERE EXISTS (SELECT * FROM AUTHORIZATION B WHERE A.USER_ID = B.USER_ID )<\/pre>\n<p>\u809d\u3068\u3057\u3066\u306f\u3001\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u4e2d\u3067\u3001<span style=\"color: #ff0000;\"><strong>WHERE\u53e5\u3092\u4f7f\u7528\u3057\u3066\u3001\u305d\u306e\u6761\u4ef6\u3068\u3057\u3066\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u5916\u306e\u5024\u3092\u53c2\u7167\u3059\u308b\u3053\u3068<\/strong><\/span>\u3067\u3059\u306d\u3002<\/p>\n<h2>\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n<p>\u4e00\u822c\u7684\u306b\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u60aa\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u3092\u4f7f\u3046\u5834\u5408\u306e\u6ce8\u610f\u70b9<\/h2>\n<p>\u5fc5\u305a\u3001WHERE\u53e5\u3067\u5bfe\u8c61\u3092\u7d5e\u308b\u969b\u306f\u3001<span style=\"color: #ff0000;\"><strong>\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u4e2d\u306b\u8a18\u8ff0\u3059\u308b<\/strong><\/span>\u3088\u3046\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u5916\u306bWHERE\u53e5\u3092\u6307\u5b9a\u3059\u308b\u5f62\u3067\u3082\u554f\u984c\u306a\u3055\u305d\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001<span style=\"color: #ff0000;\"><strong>\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3046<\/strong><\/span>\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002<\/p>\n<h2>\u300c\u7d50\u5408\u300d\u3068\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u306e\u4f7f\u3044\u5206\u3051<\/h2>\n<h3>\u7d50\u8ad6<\/h3>\n<p class=\"p1\">\u57fa\u672c\u7684\u306b\u300c\u7d50\u5408\u300d\u3092\u8a18\u8ff0\u3067\u304d\u308b\u306e\u3067\u3042\u308c\u3070\u3001<span style=\"color: #ff0000;\"><strong>\u300c\u7d50\u5408\u300d<\/strong><\/span>\u3092\u4f7f\u3046\u306e\u304c\u826f\u3044\u3002<\/p>\n<p class=\"p1\">\u7406\u7531\u3068\u3057\u3066\u306f\u3001\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u30b9\u30ab\u30e9\u30b5\u30d6\u30af\u30a8\u30ea\u3068\u3057\u3066\u4f7f\u3046\u3068\u3001\u7d50\u679c\u884c\u6570\u306e\u6570\u3060\u3051\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u304b\u306a\u308a\u9ad8\u30b3\u30b9\u30c8\u306a\u51e6\u7406\u306b\u306a\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<h3>\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea \u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h3>\n<ul>\n<li><span class=\"s1\">EXISTS<\/span>\u3092\u4f7f\u3046\u30b1\u30fc\u30b9\uff08<span class=\"s1\">JOIN<\/span>\u3060\u3068\u91cd\u8907\u884c\u304c\u53d6\u5f97\u3067\u304d\u3066\u3057\u307e\u3063\u305f\u308a\u3001\u4e0d\u8981\u884c\u3092\u53d6\u5f97\u3067\u304d\u3066\u3057\u307e\u3046\u3002\uff09<\/li>\n<li class=\"p1\">MySQL\u306e\u3088\u3046\u306b\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570(ROW_NUMBER\u95a2\u6570)\u304c\u4f7f\u3048\u306a\u3044\u30b1\u30fc\u30b9<\/li>\n<\/ul>\n<h3>\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570<\/h3>\n<p>\u57fa\u672c\u7684\u306b\u306f\u3001\u7d50\u5408\u3082\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea \u3082\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570\u306b\u66f8\u304d\u63db\u3048\u305f\u65b9\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u53ef\u8aad\u6027\u3082\u4e0a\u304c\u308b\u30b1\u30fc\u30b9\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<p>\u512a\u5148\u5ea6\u7684\u306b\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:default decode:true \">\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570 &gt; \u7d50\u5408 &gt; \u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea(\u72b6\u6cc1\u306b\u3088\u308b\uff09<\/pre>\n<p>\u305f\u3060\u3057\u3001\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570\u3082MySQL\u306f8.0\u4ee5\u4e0a\u3058\u3083\u306a\u3044\u3068\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002\u3088\u304fAWS\u306eRDS\u3068\u304b\u3060\u3068Aurora\u304cMySQL5.7\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u30a6\u30a4\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u4f7f\u3044\u305f\u304f\u3066\u3082\u4f7f\u3048\u306a\u3044\u306e\u3067\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3067\u4ee3\u7528\u3059\u308b\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u591a\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u300c\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u300d\u3068\u306f\u4f55\u304b\uff1f \u8907\u6570\u884c\u5024\u304c\u8fd4\u3063\u3066\u6765\u308b\u3088\u3046\u306a\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u4f5c\u6210\u3057\u305f\u5834\u5408\u306b\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u3042\u308b\u7279\u5b9a\u90e8\u5206\u306b\u5bfe\u8c61\u3092\u7d5e\u308b\u3053\u3068\u3067\u3001WHERE\u53e5\u3067\u8ff0\u8a9e\uff08=\u3001&lt;\u3001&gt;\u3001EXISTS\u7b49\uff09\u3092\u4f7f\u3063\u3066\u6bd4\u8f03\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u76ee\u7684\u3067 [&hellip;]","protected":false},"author":1,"featured_media":4823,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[24],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/4736"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4736"}],"version-history":[{"count":13,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/4736\/revisions"}],"predecessor-version":[{"id":20592,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/4736\/revisions\/20592"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/media\/4823"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4736"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}