{"id":3716,"date":"2014-05-02T17:56:50","date_gmt":"2014-05-02T08:56:50","guid":{"rendered":"https:\/\/www.united-bears.co.jp\/blog\/?p=3716"},"modified":"2014-05-02T17:56:50","modified_gmt":"2014-05-02T08:56:50","slug":"mysql-%e3%81%ae-update-%e3%81%a7-order-by-%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e6%9b%b4%e6%96%b0%e9%a0%86%e5%ba%8f%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/www.united-bears.co.jp\/blog\/archives\/3716","title":{"rendered":"MySQL \u306e UPDATE \u3067 ORDER BY \u3092\u4f7f\u3063\u3066\u66f4\u65b0\u9806\u5e8f\u3092\u6307\u5b9a\u3059\u308b"},"content":{"rendered":"<p>MySQL \u306f\u3001UPDATE \u6587\u306b ORDER BY \u3092\u5229\u7528\u3057\u3066\u66f4\u65b0\u9806\u5e8f\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f7f\u3046\u6a5f\u4f1a\u306f\u5c11\u306a\u3044\u3068\u601d\u3046\u304c\u3001\u4e00\u5ea6\u4f7f\u3063\u3066\u307f\u3066\u8abf\u67fb\u3057\u305f\u306e\u3067\u5099\u5fd8\u9332\u3068\u3057\u3066\u6b8b\u3057\u3066\u304a\u3053\u3046\u3068\u601d\u3046\u3002\u4f7f\u3046\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u3001<\/p>\n<ul>\n<li>\u8907\u6570\u884c\u3092\u4e00\u5ea6\u306b\u66f4\u65b0\u3059\u308b<\/li>\n<li>\u30e6\u30cb\u30fc\u30af\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u5217\u3092\u66f4\u65b0\u3059\u308b<\/li>\n<\/ul>\n<p>\u3068\u3044\u3046\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u5834\u5408\u3060\u3051\u3060\u3068\u601d\u3046\u3002<\/p>\n<p>MySQL \u306e<a href=\"http:\/\/dev.mysql.com\/doc\/refman\/5.1\/ja\/update.html\" taraget=\"_blank\">\u30de\u30cb\u30e5\u30a2\u30eb<\/a>\u306b\u306f\u3001<\/p>\n<blockquote><p>\n\u3082\u3057 UPDATE \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u304c ORDER BY \u6761\u9805\u3092\u542b\u3080\u306a\u3089\u3001\u884c\u306f\u6761\u9805\u306b\u6307\u793a\u3055\u308c\u305f\u9806\u756a\u3067\u66f4\u65b0\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u3053\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u7279\u5b9a\u306e\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002\u30c6\u30fc\u30d6\u30eb t \u304c\u56fa\u6709\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6301\u3064\u30ab\u30e9\u30e0 id \u3092\u542b\u3080\u3068\u4eee\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306f\u3001\u884c\u304c\u66f4\u65b0\u3055\u308c\u308b\u9806\u756a\u306b\u3088\u3063\u3066\u3001\u8907\u88fd\u30ad\u30fc \u30a8\u30e9\u30fc\u3068\u306a\u308a\u5931\u6557\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002 <\/p>\n<pre>\r\nUPDATE t SET id = id + 1;\r\n<\/pre>\n<p>\u4f8b\u3048\u3070\u3001\u3082\u3057\u30c6\u30fc\u30d6\u30eb\u304c id \u30ab\u30e9\u30e0\u5185\u306b1\u30682\u3092\u542b\u307f\u30012\u304c3\u306b\u66f4\u65b0\u3055\u308c\u308b\u524d\u306b1\u304c2\u306b\u66f4\u65b0\u3055\u308c\u308b\u3068\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u307e\u3059\u3002 \u3053\u306e\u554f\u984c\u3092\u9632\u3050\u306b\u306f\u3001\u5927\u304d\u3044 id \u5024\u3092\u6301\u3064\u884c\u304c\u3001\u5c0f\u3055\u3044\u5024\u3092\u6301\u3064\u884c\u3088\u308a\u3082\u5148\u306b\u66f4\u65b0\u3055\u308c\u308b\u3088\u3046\u306b ORDER BY \u6761\u9805\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <\/p>\n<pre>\r\nUPDATE t SET id = id + 1 ORDER BY id DESC;\r\n<\/pre>\n<\/blockquote>\n<p>\u3068\u3044\u3046\u8a18\u8ff0\u304c\u3042\u308b\u3002\u5fc5\u8981\u306b\u3057\u3066\u5341\u5206\u306a\u8aac\u660e\u306a\u306e\u3067\u3001\u4f7f\u3046\u3053\u3068\u306b\u306a\u3063\u305f\u80cc\u666f\u3084\u5185\u5bb9\u306e\u8aac\u660e\u306f\u4e0d\u8981\u3060\u308d\u3046\u3002<\/p>\n<h2>MySQL \u4ee5\u5916\u306e DBMS \u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408<\/h2>\n<p><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.1\/ja\/extensions-to-ansi.html\" target=\"_blank\">SQL \u6a19\u6e96\u306b\u5bfe\u3059\u308b MySQL \u62e1\u5f35\u6a5f\u80fd<\/a>\u306b\u8aac\u660e\u304c\u3042\u308b\u3088\u3046\u306b\u3001UPDATE \u6587\u306b ORDER BY \u3084 LIMIT \u3092\u4f7f\u3046\u306e\u306f MySQL \u306e\u72ec\u81ea\u4ed5\u69d8\u306a\u306e\u3067\u3001\u4ed6\u306e DBMS \u3067\u540c\u3058\u3053\u3068\u3092\u3057\u305f\u3044\u5834\u5408\u306f\u5de5\u592b\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002Google \u3067\u691c\u7d22\u3059\u308c\u3070\u6bd4\u8f03\u7684\u7c21\u5358\u306b\u898b\u3064\u3051\u3089\u308c\u308b\u304c\u3001PostgreSQL \u306e\u5834\u5408\u306f<a href=\"http:\/\/stackoverflow.com\/questions\/13187419\/update-top-n-values-using-postgresql\" target=\"_blank\">Update top N values using PostgreSQL<\/a>\u306e\u56de\u7b54\u304c\u308f\u304b\u308a\u3084\u3059\u3044\u3060\u308d\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL \u306f\u3001UPDATE \u6587\u306b ORDER BY \u3092\u5229\u7528\u3057\u3066\u66f4\u65b0\u9806\u5e8f\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f7f\u3046\u6a5f\u4f1a\u306f\u5c11\u306a\u3044\u3068\u601d\u3046\u304c\u3001\u4e00\u5ea6\u4f7f\u3063\u3066\u307f\u3066\u8abf\u67fb\u3057\u305f\u306e\u3067\u5099\u5fd8\u9332\u3068\u3057\u3066\u6b8b\u3057\u3066\u304a\u3053\u3046\u3068\u601d\u3046\u3002\u4f7f\u3046\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u3001 \u8907\u6570\u884c\u3092\u4e00\u5ea6\u306b\u66f4\u65b0\u3059 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45,11],"tags":[],"class_list":["post-3716","post","type-post","status-publish","format-standard","hentry","category-mysql","category-web-develop"],"_links":{"self":[{"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/posts\/3716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/comments?post=3716"}],"version-history":[{"count":6,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/posts\/3716\/revisions"}],"predecessor-version":[{"id":3722,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/posts\/3716\/revisions\/3722"}],"wp:attachment":[{"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/media?parent=3716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/categories?post=3716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.united-bears.co.jp\/blog\/wp-json\/wp\/v2\/tags?post=3716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}