{"id":3202,"date":"2020-07-02T15:39:20","date_gmt":"2020-07-02T06:39:20","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=3202"},"modified":"2025-06-19T18:48:11","modified_gmt":"2025-06-19T09:48:11","slug":"post-3202","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/3202","title":{"rendered":"MySQL\u3067\u30aa\u30fc\u30c8\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u305b\u305a\u306b\u30b0\u30eb\u30fc\u30d7\u6bce\u306b\u9023\u756a\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>MySQL\u3067\u30aa\u30fc\u30c8\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u305b\u305a\u306b\u30b0\u30eb\u30fc\u30d7\u6bce\u3067\u9023\u756a\u3092\u5272\u308a\u632f\u308a\u305f\u304b\u3063\u305f\u3002\u5177\u4f53\u7684\u306b\u306f\u63b2\u793a\u677f\u3092\u4f5c\u6210\u3059\u308b\u6848\u4ef6\u304c\u3042\u308a\u30b9\u30ec\u30c3\u30c9\u6bce\u306b\u30ec\u30b9\u30ca\u30f3\u30d0\u30fc\u3092\u8868\u793a\u3055\u305b\u305f\u304b\u3063\u305f\u3002\u4ee5\u4e0b\u306bSQL\u6587\u3068PHP\u304b\u3089\u5b9f\u884c\u3055\u305b\u308b\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>MySQL8\u7cfb\u4ee5\u964d\u306f\u5225\u306e\u65b9\u6cd5\u304c\u4fbf\u5229(2025\/06\/19\u8ffd\u8a18)<\/h2>\n<p>MySQL\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c8\u7cfb\u4ee5\u964d\u306e\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3092\u7528\u3044\u308b\u65b9\u304c\u697d\u3067\u4fbf\u5229\u3002<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Bc7Xtn6Bi4\"><p><a href=\"https:\/\/taitan916.info\/blog\/archives\/6405\">MySQL\u3067ROW_NUMBER\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b0\u30eb\u30fc\u30d7\u6bce\u306b\u9023\u756a\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;MySQL\u3067ROW_NUMBER\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b0\u30eb\u30fc\u30d7\u6bce\u306b\u9023\u756a\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5&#8221; &#8212; \u52c9\u5f37\u3057\u305f\u3053\u3068\u306e\u30e1\u30e2\" src=\"https:\/\/taitan916.info\/blog\/archives\/6405\/embed#?secret=wLgOkTDwrt#?secret=Bc7Xtn6Bi4\" data-secret=\"Bc7Xtn6Bi4\" width=\"580\" height=\"327\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<h2>SQL\u6587<\/h2>\n<p>phpmyadmin\u3084adminer\u304b\u3089\u306f\u4ee5\u4e0bSQL\u6587\u3067group_id\u3054\u3068\u306b\u9023\u756a(no)\u304c\u5272\u308a\u632f\u3089\u308c\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">SET @no:=0;\r\nSET @group_id:=null;\r\nSELECT \r\n    *, \r\n    IF(@group_id &lt;&gt; group_id, @no:=1, @no:=@no+1) AS no,\r\n    @group_id := group_id \r\nFROM test_table\r\nORDER BY group_id DESC;<\/pre>\n<p>PHP\u304b\u3089SQL\u6587\u3092\u767a\u884c\u3059\u308b\u5834\u5408\u306f\u4ee5\u4e0b\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">$sql = 'SET @no:=0;';\r\n$row = $mysqli-&gt;query($sql);\r\n\r\n$sql = 'SET @group_id:=null;';\r\n$row = $mysqli-&gt;query($sql);\r\n\r\n$sql = '\r\n    SELECT \r\n        *, \r\n        IF(@group_id &lt;&gt; group_id, @no:=1, @no:=@no+1) AS no,\r\n        @group_id := group_id \r\n    FROM test_table\r\n    ORDER BY group_id DESC\r\n;<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u30da\u30fc\u30b8\u30f3\u30b0\u306b\u3082\u5bfe\u5fdc\u3055\u305b\u305f\u3044<\/h2>\n<p>\u63b2\u793a\u677f\u3060\u3068\u6570\u5341\u4ef6\u307b\u3069\u306e\u66f8\u304d\u8fbc\u307f\u3054\u3068\u306b\u300c\u6b21\u306e\u30da\u30fc\u30b8\u3078\u300d\u7b49\u306e\u30da\u30fc\u30b8\u30f3\u30b0\u304c\u5fc5\u8981\u306b\u306a\u308b\u304c\u3001\u5148\u8ff0\u306e\u30bd\u30fc\u30b9\u3060\u3068\u30da\u30fc\u30b8\u304c\u5207\u308a\u66ff\u308f\u308b\u3054\u3068\u306b\u4e0a\u304b\u3089\u30ec\u30b9\u30ca\u30f3\u30d0\u30fc\u304c1\uff5e\u3068\u30ea\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3057\u307e\u3046\u3002<\/p>\n<p>\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u30da\u30fc\u30b8\u304c\u5207\u308a\u66ff\u308f\u3063\u3066\u3082\u30ec\u30b9\u30ca\u30f3\u30d0\u30fc\u304c\u6b63\u5e38\u306b\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">$page = 1; \/\/\u30da\u30fc\u30b8\u6570\r\n$limit = 20; \/\/1\u30da\u30fc\u30b8\u306e\u6700\u5927\u8868\u793a\u6570\r\n$offset = $page * $limit;\r\n$sql = 'SET @no:=' . $offset . ';';<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u30a2\u30c3\u30c8\u30de\u30fc\u30af\u3068\u304b\u30b3\u30ed\u30f3\u3068\u304b\u306f\u4f55\uff1f<\/h2>\n<p>\u4eca\u56de\u4f5c\u6210\u3057\u305fSQL\u6587\u306f\u53c2\u8003\u30b5\u30a4\u30c8\u3092\u5143\u306b\u3057\u305f\u304c\u3001\u30a2\u30c3\u30c8\u30de\u30fc\u30af\u3068\u304b\u30b3\u30ed\u30f3\u306a\u3069\u5e73\u7d20\u3067\u306f\u4f7f\u7528\u3057\u306a\u3044\u8a18\u8ff0\u304c\u591a\u6570\u898b\u53d7\u3051\u3089\u308c\u305f\u3002<\/p>\n<h3>@(\u30a2\u30c3\u30c8\u30de\u30fc\u30af)<\/h3>\n<p>\u5909\u6570\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u4f7f\u7528\u3059\u308b\u3002PHP\u3067\u3044\u3046$\u30de\u30fc\u30af\u307f\u305f\u3044\u306a\u3082\u306e\u3063\u307d\u3044\u3002<\/p>\n<h3>:=(\u30b3\u30ed\u30f3\u30fb\u30a4\u30b3\u30fc\u30eb)<\/h3>\n<p>\u30a4\u30b3\u30fc\u30eb\u3068\u540c\u3058\u3001\u3082\u3057\u304f\u306f\u4ee3\u5165\u306e\u969b\u306b\u4f7f\u7528\u3059\u308b\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u3060\u3068no\u3068\u3044\u3046\u5909\u6570\u306b0\u3092\u4ee3\u5165\u3059\u308b\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">$sql = 'SET @no:=0;';<\/pre>\n<h3>IF(@group_id &lt;&gt; group_id, @no:=1, @no:=@no+1) AS no\u306e\u90e8\u5206<\/h3>\n<p>IF\uff5e\u304b\u3089AS\u307e\u3067\u306e\u90e8\u5206\u306f\u53c2\u8003\u6f14\u7b97\u5b50\u3068\u306e\u3053\u3068\u3002group_id\u304c\u7b49\u3057\u304f\u306a\u3044\u5834\u5408\u306fno\u306f1\u3001\u540c\u3058\u5834\u5408\u306f+1\u3068\u3059\u308b\u3002\u3064\u307e\u308a\u540c\u3058\u30b0\u30eb\u30fc\u30d7\u3067\u3042\u308c\u3070\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3057\u3066\u3044\u304f\u3068\u3044\u3063\u305f\u3082\u306e\u3002\u305d\u306e\u5024\u3092no\u30ab\u30e9\u30e0\u3068\u3057\u3066\u53d7\u3051\u53d6\u3089\u308c\u308b(AS no\u90e8\u5206)\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u53c2\u8003\u30b5\u30a4\u30c8<\/h2>\n<p><a href=\"https:\/\/qiita.com\/toyottoyo\/items\/813338f4756dee41e49b\">https:\/\/qiita.com\/toyottoyo\/items\/813338f4756dee41e49b<\/a><\/p>\n<p><a href=\"https:\/\/style.potepan.com\/articles\/15271.html\">https:\/\/style.potepan.com\/articles\/15271.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u3067\u30aa\u30fc\u30c8\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u305b\u305a\u306b\u30b0\u30eb\u30fc\u30d7\u6bce\u3067\u9023\u756a\u3092\u5272\u308a\u632f\u308a\u305f\u304b\u3063\u305f\u3002 ... <\/p>\n","protected":false},"author":1,"featured_media":1072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,66],"tags":[],"class_list":["post-3202","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql","category-database"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/3202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/comments?post=3202"}],"version-history":[{"count":2,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/3202\/revisions"}],"predecessor-version":[{"id":6967,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/3202\/revisions\/6967"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media\/1072"}],"wp:attachment":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media?parent=3202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/categories?post=3202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/tags?post=3202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}