{"id":309,"date":"2009-08-15T17:23:01","date_gmt":"2009-08-15T08:23:01","guid":{"rendered":"http:\/\/blog.cfms.jp\/wordpress\/?p=309"},"modified":"2012-02-21T09:19:17","modified_gmt":"2012-02-21T00:19:17","slug":"%e3%83%95%e3%83%bc%e3%83%ab%e3%83%89%e3%81%ae%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e9%80%a3%e7%95%aa%e3%81%ab%e6%9b%b4%e6%96%b0%e3%81%99%e3%82%8bsql","status":"publish","type":"post","link":"https:\/\/blog.cfms.jp\/?p=309","title":{"rendered":"\u30d5\u30fc\u30eb\u30c9\u306e\u30c7\u30fc\u30bf\u3092\u9023\u756a\u306b\u66f4\u65b0\u3059\u308bSQL"},"content":{"rendered":"

\u3042\u308bMySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u66f4\u65b0\u3059\u308b\u305f\u3081\u306b\u3001\u30ed\u30fc\u30ab\u30eb\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8907\u88fd\u3057\u3066\u3053\u3053\u3067\u66f4\u65b0\u3057\u305f\u30c7\u30fc\u30bf\u3092\u5dee\u3057\u623b\u3059\u3068\u3044\u3046\u65b9\u6cd5\u3092\u3068\u3063\u305f\u3053\u3068\u304c\u3042\u308b\u3002\u5dee\u3057\u623b\u3059\u3068\u304d\u306b\u8ffd\u52a0\u30c7\u30fc\u30bf\u306e\u5834\u5408\u3001auto-increment\u306b\u6307\u5b9a\u3057\u3066\u3042\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u306f\u3088\u304f\u78ba\u8a8d\u3057\u306a\u3044\u3068\u3001\u30ed\u30fc\u30ab\u30eb\u3067\u4f5c\u696d\u4e2d\u306b\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3082\u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\u304c\u884c\u306a\u308f\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u305f\u5834\u5408\u306bID\u304c\u30d0\u30c3\u30c6\u30a3\u30f3\u30b0\u3057\u3066\u3057\u307e\u3046\u3002<\/p>\n

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\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u30c7\u30fc\u30bf\u524a\u9664\u306b\u3088\u3063\u3066auto-increment\u5024\u304c\u3068\u3073\u3068\u3073\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u307e\u3001\u305d\u308c\u306f\u307e\u3063\u305f\u304f\u69cb\u308f\u306a\u3044\u3093\u3060\u3051\u3069\u3001\u5927\u304d\u304f\u9023\u756a\u304c\u7a7a\u3044\u3066\u3044\u308b\u90e8\u5206\u304c\u3042\u308b\u3002\u4eca\u56de\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3044\u3063\u305f\u3093\u524a\u9664\u3057\u305fauto-increment\u5024\u306b\u307e\u3063\u305f\u304f\u95a2\u4fc2\u306a\u3044\u30c7\u30fc\u30bf\u304c\u5165\u529b\u3055\u308c\u3066\u3082\u30b7\u30b9\u30c6\u30e0\u306e\u52d5\u4f5c\u306b\u5168\u304f\u554f\u984c\u306a\u3044\u306e\u3067\u3001\u8ffd\u52a0\u5206\u306e\u30c7\u30fc\u30bf\u306f\u3053\u306eauto-increment\u5024\u304c\u9023\u7d9a\u3067\u5927\u304d\u304f\u7a7a\u304d\u304c\u3067\u304d\u3066\u3044\u308b\u90e8\u5206\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306b\u3057\u305f\u3002<\/p>\n

\u305d\u306e\u305f\u3081\u306b\u306f\u30ed\u30fc\u30ab\u30eb\u3067\u8ffd\u52a0\u3057\u305f\u30c7\u30fc\u30bf\u306eauto-increment\u5024\u3092\u3042\u308b\u5024\u304b\u3089\u306e\u9023\u756a\u306b\u632f\u308a\u306a\u304a\u3059\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n

\u3067\u3001\u305d\u306e\u305f\u3081\u306eSQL\u6587\u304c\u6b21\u306e\uff12\u884c<\/p>\n

SET @i := 0;
\nUPDATE `\u30c6\u30fc\u30d6\u30eb\u540d<\/i>` SET `\u30ab\u30e9\u30e0\u540d<\/i>` = (@i := @i +1) WHERE [\u6761\u4ef6]<\/code><\/p>\n

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