{"id":1131,"date":"2016-03-21T16:56:40","date_gmt":"2016-03-21T08:56:40","guid":{"rendered":"http:\/\/jingxianhome.aliapp.com\/?p=1131"},"modified":"2016-03-21T16:58:05","modified_gmt":"2016-03-21T08:58:05","slug":"mysql%e7%b4%a2%e5%bc%95%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e5%92%8c%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/www.yeetrack.com\/?p=1131","title":{"rendered":"MySQL\u7d22\u5f15\u4f7f\u7528\u65b9\u6cd5\u548c\u6027\u80fd\u4f18\u5316"},"content":{"rendered":"

\u5173\u4e8eMySQL\u7d22\u5f15\u7684\u597d\u5904\uff0c\u5982\u679c\u6b63\u786e\u5408\u7406\u8bbe\u8ba1\u5e76\u4e14\u4f7f\u7528\u7d22\u5f15\u7684MySQL\u662f\u4e00\u8f86\u5170\u535a\u57fa\u5c3c\u7684\u8bdd\uff0c\u90a3\u4e48\u6ca1\u6709\u8bbe\u8ba1\u548c\u4f7f\u7528\u7d22\u5f15\u7684MySQL\u5c31\u662f\u4e00\u4e2a\u4eba\u529b\u4e09\u8f6e\u8f66\u3002\u5bf9\u4e8e\u6ca1\u6709\u7d22\u5f15\u7684\u8868\uff0c\u5355\u8868\u67e5\u8be2\u53ef\u80fd\u51e0\u5341\u4e07\u6570\u636e\u5c31\u662f\u74f6\u9888\uff0c\u800c\u901a\u5e38\u5927\u578b\u7f51\u7ad9\u5355\u65e5\u5c31\u53ef\u80fd\u4f1a\u4ea7\u751f\u51e0\u5341\u4e07\u751a\u81f3\u51e0\u767e\u4e07\u7684\u6570\u636e\uff0c\u6ca1\u6709\u7d22\u5f15\u67e5\u8be2\u4f1a\u53d8\u7684\u975e\u5e38\u7f13\u6162\u3002\u8fd8\u662f\u4ee5WordPress\u6765\u8bf4\uff0c\u5176\u591a\u4e2a\u6570\u636e\u8868\u90fd\u4f1a\u5bf9\u7ecf\u5e38\u88ab\u67e5\u8be2\u7684\u5b57\u6bb5\u6dfb\u52a0\u7d22\u5f15\uff0c\u6bd4\u5982wp_comments\u8868\u4e2d\u9488\u5bf95\u4e2a\u5b57\u6bb5\u8bbe\u8ba1\u4e86BTREE\u7d22\u5f15\u3002<\/p>\n

\u4e00\u4e2a\u7b80\u5355\u7684\u5bf9\u6bd4\u6d4b\u8bd5<\/h5>\n

\u4ee5\u6211\u53bb\u5e74\u6d4b\u8bd5\u7684\u6570\u636e\u4f5c\u4e3a\u4e00\u4e2a\u7b80\u5355\u793a\u4f8b\uff0c20\u591a\u6761\u6570\u636e\u6e90\u968f\u673a\u751f\u6210200\u4e07\u6761\u6570\u636e\uff0c\u5e73\u5747\u6bcf\u6761\u6570\u636e\u6e90\u90fd\u91cd\u590d\u5927\u698210\u4e07\u6b21\uff0c\u8868\u7ed3\u6784\u6bd4\u8f83\u7b80\u5355\uff0c\u4ec5\u5305\u542b\u4e00\u4e2a\u81ea\u589eID\uff0c\u4e00\u4e2achar\u7c7b\u578b\uff0c\u4e00\u4e2atext\u7c7b\u578b\u548c\u4e00\u4e2aint\u7c7b\u578b\uff0c\u5355\u88682G\u5927\u5c0f\uff0c\u4f7f\u7528MyIASM\u5f15\u64ce\u3002\u5f00\u59cb\u6d4b\u8bd5\u672a\u6dfb\u52a0\u4efb\u4f55\u7d22\u5f15\u3002<\/p>\n

\u6267\u884c\u4e0b\u9762\u7684SQL\u8bed\u53e5\uff1a<\/p>\n

\n
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1<\/code><\/td>\nmysql> <\/code>SELECT<\/code> id,FROM_UNIXTIME(<\/code>time<\/code>) <\/code>FROM<\/code> article <\/code>WHERE<\/code> a.title=<\/code>'\u6d4b\u8bd5\u6807\u9898'<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u67e5\u8be2\u9700\u8981\u7684\u65f6\u95f4\u975e\u5e38\u6050\u6016\u7684\uff0c\u5982\u679c\u52a0\u4e0a\u8054\u5408\u67e5\u8be2\u548c\u5176\u4ed6\u4e00\u4e9b\u7ea6\u675f\u6761\u4ef6\uff0c\u6570\u636e\u5e93\u4f1a\u75af\u72c2\u7684\u6d88\u8017\u5185\u5b58\uff0c\u5e76\u4e14\u4f1a\u5f71\u54cd\u524d\u7aef\u7a0b\u5e8f\u7684\u6267\u884c\u3002\u8fd9\u65f6\u7ed9title\u5b57\u6bb5\u6dfb\u52a0\u4e00\u4e2aBTREE\u7d22\u5f15\uff1a<\/p>\n

\n
\n
\n\n\n\n
1<\/code><\/td>\nmysql> <\/code>ALTER<\/code> TABLE<\/code> article <\/code>ADD<\/code> INDEX<\/code> index_article_title <\/code>ON<\/code> title(200);<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u518d\u6b21\u6267\u884c\u4e0a\u8ff0\u67e5\u8be2\u8bed\u53e5\uff0c\u5176\u5bf9\u6bd4\u975e\u5e38\u660e\u663e<\/p>\n

MySQL\u7d22\u5f15\u7684\u6982\u5ff5<\/h5>\n

\u7d22\u5f15\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6587\u4ef6(InnoDB\u6570\u636e\u8868\u4e0a\u7684\u7d22\u5f15\u662f\u8868\u7a7a\u95f4\u7684\u4e00\u4e2a\u7ec4\u6210\u90e8\u5206)\uff0c\u5b83\u4eec\u5305\u542b\u7740\u5bf9\u6570\u636e\u8868\u91cc\u6240\u6709\u8bb0\u5f55\u7684\u5f15\u7528\u6307\u9488\u3002\u66f4\u901a\u4fd7\u7684\u8bf4\uff0c\u6570\u636e\u5e93\u7d22\u5f15\u597d\u6bd4\u662f\u4e00\u672c\u4e66\u524d\u9762\u7684\u76ee\u5f55\uff0c\u80fd\u52a0\u5feb\u6570\u636e\u5e93\u7684\u67e5\u8be2\u901f\u5ea6\u3002\u4e0a\u8ff0SQL\u8bed\u53e5\uff0c\u5728\u6ca1\u6709\u7d22\u5f15\u7684\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u5e93\u4f1a\u904d\u5386\u5168\u90e8200\u6761\u6570\u636e\u540e\u9009\u62e9\u7b26\u5408\u6761\u4ef6\u7684\uff1b\u800c\u6709\u4e86\u76f8\u5e94\u7684\u7d22\u5f15\u4e4b\u540e\uff0c\u6570\u636e\u5e93\u4f1a\u76f4\u63a5\u5728\u7d22\u5f15\u4e2d\u67e5\u627e\u7b26\u5408\u6761\u4ef6\u7684\u9009\u9879\u3002\u5982\u679c\u6211\u4eec\u628aSQL\u8bed\u53e5\u6362\u6210\u201cSELECT * FROM article WHERE id=2000000\u201d\uff0c\u90a3\u4e48\u4f60\u662f\u5e0c\u671b\u6570\u636e\u5e93\u6309\u7167\u987a\u5e8f\u8bfb\u53d6\u5b8c200\u4e07\u884c\u6570\u636e\u4ee5\u540e\u7ed9\u4f60\u7ed3\u679c\u8fd8\u662f\u76f4\u63a5\u5728\u7d22\u5f15\u4e2d\u5b9a\u4f4d\u5462\uff1f\u4e0a\u9762\u7684\u4e24\u4e2a\u56fe\u7247\u9c9c\u660e\u7684\u7528\u65f6\u5bf9\u6bd4\u5df2\u7ecf\u7ed9\u51fa\u4e86\u7b54\u6848\uff08\u6ce8\uff1a\u4e00\u822c\u6570\u636e\u5e93\u9ed8\u8ba4\u90fd\u4f1a\u4e3a\u4e3b\u952e\u751f\u6210\u7d22\u5f15\uff09\u3002<\/p>\n

\u7d22\u5f15\u5206\u4e3a\u805a\u7c07\u7d22\u5f15\u548c\u975e\u805a\u7c07\u7d22\u5f15\u4e24\u79cd\uff0c\u805a\u7c07\u7d22\u5f15\u662f\u6309\u7167\u6570\u636e\u5b58\u653e\u7684\u7269\u7406\u4f4d\u7f6e\u4e3a\u987a\u5e8f\u7684\uff0c\u800c\u975e\u805a\u7c07\u7d22\u5f15\u5c31\u4e0d\u4e00\u6837\u4e86\uff1b\u805a\u7c07\u7d22\u5f15\u80fd\u63d0\u9ad8\u591a\u884c\u68c0\u7d22\u7684\u901f\u5ea6\uff0c\u800c\u975e\u805a\u7c07\u7d22\u5f15\u5bf9\u4e8e\u5355\u884c\u7684\u68c0\u7d22\u5f88\u5feb\u3002<\/p>\n

MySQL\u7d22\u5f15\u7684\u7c7b\u578b<\/h5>\n

1. \u666e\u901a\u7d22\u5f15<\/strong><\/p>\n

\u8fd9\u662f\u6700\u57fa\u672c\u7684\u7d22\u5f15\uff0c\u5b83\u6ca1\u6709\u4efb\u4f55\u9650\u5236\uff0c\u6bd4\u5982\u4e0a\u6587\u4e2d\u4e3atitle\u5b57\u6bb5\u521b\u5efa\u7684\u7d22\u5f15\u5c31\u662f\u4e00\u4e2a\u666e\u901a\u7d22\u5f15\uff0cMyIASM\u4e2d\u9ed8\u8ba4\u7684BTREE\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u4e5f\u662f\u6211\u4eec\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u7528\u5230\u7684\u7d22\u5f15\u3002<\/p>\n

\n
\n
\n\n\n\n
01<\/code><\/td>\n\u2013\u76f4\u63a5\u521b\u5efa\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
02<\/code><\/td>\nCREATE<\/code> INDEX<\/code> index_name <\/code>ON<\/code> table<\/code>(<\/code>column<\/code>(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
03<\/code><\/td>\n\u2013\u4fee\u6539\u8868\u7ed3\u6784\u7684\u65b9\u5f0f\u6dfb\u52a0\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
04<\/code><\/td>\nALTER<\/code> TABLE<\/code> table_name <\/code>ADD<\/code> INDEX<\/code> index_name <\/code>ON<\/code> (<\/code>column<\/code>(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
05<\/code><\/td>\n\u2013\u521b\u5efa\u8868\u7684\u65f6\u5019\u540c\u65f6\u521b\u5efa\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
06<\/code><\/td>\nCREATE<\/code> TABLE<\/code> `<\/code>table<\/code>` (<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
07<\/code><\/td>\n`id` <\/code>int<\/code>(11) <\/code>NOT<\/code> NULL<\/code> AUTO_INCREMENT ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
08<\/code><\/td>\n`title` <\/code>char<\/code>(255) <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NOT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
09<\/code><\/td>\n`content` text <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
10<\/code><\/td>\n`<\/code>time<\/code>` <\/code>int<\/code>(10) <\/code>NULL<\/code> DEFAULT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
11<\/code><\/td>\nPRIMARY<\/code> KEY<\/code> (`id`),<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
12<\/code><\/td>\nINDEX<\/code> index_name (title(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
13<\/code><\/td>\n)<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
14<\/code><\/td>\n\u2013\u5220\u9664\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
15<\/code><\/td>\nDROP<\/code> INDEX<\/code> index_name <\/code>ON<\/code> table<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

2. \u552f\u4e00\u7d22\u5f15<\/strong><\/p>\n

\u4e0e\u666e\u901a\u7d22\u5f15\u7c7b\u4f3c\uff0c\u4e0d\u540c\u7684\u5c31\u662f\uff1a\u7d22\u5f15\u5217\u7684\u503c\u5fc5\u987b\u552f\u4e00\uff0c\u4f46\u5141\u8bb8\u6709\u7a7a\u503c\uff08\u6ce8\u610f\u548c\u4e3b\u952e\u4e0d\u540c\uff09\u3002\u5982\u679c\u662f\u7ec4\u5408\u7d22\u5f15\uff0c\u5219\u5217\u503c\u7684\u7ec4\u5408\u5fc5\u987b\u552f\u4e00\uff0c\u521b\u5efa\u65b9\u6cd5\u548c\u666e\u901a\u7d22\u5f15\u7c7b\u4f3c\u3002<\/p>\n

\n
\n
\n\n\n\n
01<\/code><\/td>\n\u2013\u521b\u5efa\u552f\u4e00\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
02<\/code><\/td>\nCREATE<\/code> UNIQUE<\/code> INDEX<\/code> indexName <\/code>ON<\/code> table<\/code>(<\/code>column<\/code>(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
03<\/code><\/td>\n\u2013\u4fee\u6539\u8868\u7ed3\u6784<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
04<\/code><\/td>\nALTER<\/code> TABLE<\/code> table_name <\/code>ADD<\/code> UNIQUE<\/code> indexName <\/code>ON<\/code> (<\/code>column<\/code>(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
05<\/code><\/td>\n\u2013\u521b\u5efa\u8868\u7684\u65f6\u5019\u76f4\u63a5\u6307\u5b9a<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
06<\/code><\/td>\nCREATE<\/code> TABLE<\/code> `<\/code>table<\/code>` (<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
07<\/code><\/td>\n`id` <\/code>int<\/code>(11) <\/code>NOT<\/code> NULL<\/code> AUTO_INCREMENT ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
08<\/code><\/td>\n`title` <\/code>char<\/code>(255) <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NOT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
09<\/code><\/td>\n`content` text <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
10<\/code><\/td>\n`<\/code>time<\/code>` <\/code>int<\/code>(10) <\/code>NULL<\/code> DEFAULT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
11<\/code><\/td>\nPRIMARY<\/code> KEY<\/code> (`id`),<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
12<\/code><\/td>\nUNIQUE<\/code> indexName (title(length))<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
13<\/code><\/td>\n);<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

3. \u5168\u6587\u7d22\u5f15\uff08FULLTEXT\uff09<\/strong><\/p>\n

MySQL\u4ece3.23.23\u7248\u5f00\u59cb\u652f\u6301\u5168\u6587\u7d22\u5f15\u548c\u5168\u6587\u68c0\u7d22\uff0cFULLTEXT\u7d22\u5f15\u4ec5\u53ef\u7528\u4e8e MyISAM \u8868\uff1b\u4ed6\u4eec\u53ef\u4ee5\u4eceCHAR\u3001VARCHAR\u6216TEXT\u5217\u4e2d\u4f5c\u4e3aCREATE TABLE\u8bed\u53e5\u7684\u4e00\u90e8\u5206\u88ab\u521b\u5efa\uff0c\u6216\u662f\u968f\u540e\u4f7f\u7528ALTER TABLE \u6216CREATE INDEX\u88ab\u6dfb\u52a0\u3002\/\/\/\/\u5bf9\u4e8e\u8f83\u5927\u7684\u6570\u636e\u96c6\uff0c\u5c06\u4f60\u7684\u8d44\u6599\u8f93\u5165\u4e00\u4e2a\u6ca1\u6709FULLTEXT\u7d22\u5f15\u7684\u8868\u4e2d\uff0c\u7136\u540e\u521b\u5efa\u7d22\u5f15\uff0c\u5176\u901f\u5ea6\u6bd4\u628a\u8d44\u6599\u8f93\u5165\u73b0\u6709FULLTEXT\u7d22\u5f15\u7684\u901f\u5ea6\u66f4\u4e3a\u5feb\u3002\u4e0d\u8fc7\u5207\u8bb0\u5bf9\u4e8e\u5927\u5bb9\u91cf\u7684\u6570\u636e\u8868\uff0c\u751f\u6210\u5168\u6587\u7d22\u5f15\u662f\u4e00\u4e2a\u975e\u5e38\u6d88\u8017\u65f6\u95f4\u975e\u5e38\u6d88\u8017\u786c\u76d8\u7a7a\u95f4\u7684\u505a\u6cd5\u3002<\/p>\n

\n
\n
\n\n\n\n
01<\/code><\/td>\n\u2013\u521b\u5efa\u8868\u7684\u9002\u5408\u6dfb\u52a0\u5168\u6587\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
02<\/code><\/td>\nCREATE<\/code> TABLE<\/code> `<\/code>table<\/code>` (<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
03<\/code><\/td>\n`id` <\/code>int<\/code>(11) <\/code>NOT<\/code> NULL<\/code> AUTO_INCREMENT ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
04<\/code><\/td>\n`title` <\/code>char<\/code>(255) <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NOT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
05<\/code><\/td>\n`content` text <\/code>CHARACTER<\/code> SET<\/code> utf8 <\/code>COLLATE<\/code> utf8_general_ci <\/code>NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
06<\/code><\/td>\n`<\/code>time<\/code>` <\/code>int<\/code>(10) <\/code>NULL<\/code> DEFAULT<\/code> NULL<\/code> ,<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
07<\/code><\/td>\nPRIMARY<\/code> KEY<\/code> (`id`),<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
08<\/code><\/td>\nFULLTEXT (content)<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
09<\/code><\/td>\n);<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
10<\/code><\/td>\n\u2013\u4fee\u6539\u8868\u7ed3\u6784\u6dfb\u52a0\u5168\u6587\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
11<\/code><\/td>\nALTER<\/code> TABLE<\/code> article <\/code>ADD<\/code> FULLTEXT index_content(content)<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
12<\/code><\/td>\n\u2013\u76f4\u63a5\u521b\u5efa\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
13<\/code><\/td>\nCREATE<\/code> FULLTEXT <\/code>INDEX<\/code> index_content <\/code>ON<\/code> article(content)<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

4. \u5355\u5217\u7d22\u5f15\u3001\u591a\u5217\u7d22\u5f15<\/strong><\/p>\n

\u591a\u4e2a\u5355\u5217\u7d22\u5f15\u4e0e\u5355\u4e2a\u591a\u5217\u7d22\u5f15\u7684\u67e5\u8be2\u6548\u679c\u4e0d\u540c\uff0c\u56e0\u4e3a\u6267\u884c\u67e5\u8be2\u65f6\uff0cMySQL\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u7d22\u5f15\uff0c\u4f1a\u4ece\u591a\u4e2a\u7d22\u5f15\u4e2d\u9009\u62e9\u4e00\u4e2a\u9650\u5236\u6700\u4e3a\u4e25\u683c\u7684\u7d22\u5f15\u3002<\/p>\n

5. \u7ec4\u5408\u7d22\u5f15\uff08\u6700\u5de6\u524d\u7f00\uff09<\/strong><\/p>\n

\u5e73\u65f6\u7528\u7684SQL\u67e5\u8be2\u8bed\u53e5\u4e00\u822c\u90fd\u6709\u6bd4\u8f83\u591a\u7684\u9650\u5236\u6761\u4ef6\uff0c\u6240\u4ee5\u4e3a\u4e86\u8fdb\u4e00\u6b65\u69a8\u53d6MySQL\u7684\u6548\u7387\uff0c\u5c31\u8981\u8003\u8651\u5efa\u7acb\u7ec4\u5408\u7d22\u5f15\u3002\u4f8b\u5982\u4e0a\u8868\u4e2d\u9488\u5bf9title\u548ctime\u5efa\u7acb\u4e00\u4e2a\u7ec4\u5408\u7d22\u5f15\uff1aALTER TABLE article ADD INDEX index_titme_time (title(50),time(10))\u3002\u5efa\u7acb\u8fd9\u6837\u7684\u7ec4\u5408\u7d22\u5f15\uff0c\u5176\u5b9e\u662f\u76f8\u5f53\u4e8e\u5206\u522b\u5efa\u7acb\u4e86\u4e0b\u9762\u4e24\u7ec4\u7ec4\u5408\u7d22\u5f15\uff1a<\/p>\n

\u2013title,time<\/p>\n

\u2013title<\/p>\n

\u4e3a\u4ec0\u4e48\u6ca1\u6709time\u8fd9\u6837\u7684\u7ec4\u5408\u7d22\u5f15\u5462\uff1f\u8fd9\u662f\u56e0\u4e3aMySQL\u7ec4\u5408\u7d22\u5f15\u201c\u6700\u5de6\u524d\u7f00\u201d\u7684\u7ed3\u679c\u3002\u7b80\u5355\u7684\u7406\u89e3\u5c31\u662f\u53ea\u4ece\u6700\u5de6\u9762\u7684\u5f00\u59cb\u7ec4\u5408\u3002\u5e76\u4e0d\u662f\u53ea\u8981\u5305\u542b\u8fd9\u4e24\u5217\u7684\u67e5\u8be2\u90fd\u4f1a\u7528\u5230\u8be5\u7ec4\u5408\u7d22\u5f15\uff0c\u5982\u4e0b\u9762\u7684\u51e0\u4e2aSQL\u6240\u793a\uff1a<\/p>\n

\n
\n
\n\n\n\n
1<\/code><\/td>\n\u2013\u4f7f\u7528\u5230\u4e0a\u9762\u7684\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
2<\/code><\/td>\nSELECT<\/code> * <\/code>FROM<\/code> article WHREE title=<\/code>'\u6d4b\u8bd5'<\/code> AND<\/code> time<\/code>=1234567890;<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
3<\/code><\/td>\nSELECT<\/code> * <\/code>FROM<\/code> article WHREE utitle=<\/code>'\u6d4b\u8bd5'<\/code>;<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
4<\/code><\/td>\n\u2013\u4e0d\u4f7f\u7528\u4e0a\u9762\u7684\u7d22\u5f15<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n
5<\/code><\/td>\nSELECT<\/code> * <\/code>FROM<\/code> article WHREE <\/code>time<\/code>=1234567890;<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n
MySQL\u7d22\u5f15\u7684\u4f18\u5316<\/h5>\n

\u4e0a\u9762\u90fd\u5728\u8bf4\u4f7f\u7528\u7d22\u5f15\u7684\u597d\u5904\uff0c\u4f46\u8fc7\u591a\u7684\u4f7f\u7528\u7d22\u5f15\u5c06\u4f1a\u9020\u6210\u6ee5\u7528\u3002\u56e0\u6b64\u7d22\u5f15\u4e5f\u4f1a\u6709\u5b83\u7684\u7f3a\u70b9\uff1a\u867d\u7136\u7d22\u5f15\u5927\u5927\u63d0\u9ad8\u4e86\u67e5\u8be2\u901f\u5ea6\uff0c\u540c\u65f6\u5374\u4f1a\u964d\u4f4e\u66f4\u65b0\u8868\u7684\u901f\u5ea6\uff0c\u5982\u5bf9\u8868\u8fdb\u884cINSERT\u3001UPDATE\u548cDELETE\u3002\u56e0\u4e3a\u66f4\u65b0\u8868\u65f6\uff0cMySQL\u4e0d\u4ec5\u8981\u4fdd\u5b58\u6570\u636e\uff0c\u8fd8\u8981\u4fdd\u5b58\u4e00\u4e0b\u7d22\u5f15\u6587\u4ef6\u3002\u5efa\u7acb\u7d22\u5f15\u4f1a\u5360\u7528\u78c1\u76d8\u7a7a\u95f4\u7684\u7d22\u5f15\u6587\u4ef6\u3002\u4e00\u822c\u60c5\u51b5\u8fd9\u4e2a\u95ee\u9898\u4e0d\u592a\u4e25\u91cd\uff0c\u4f46\u5982\u679c\u4f60\u5728\u4e00\u4e2a\u5927\u8868\u4e0a\u521b\u5efa\u4e86\u591a\u79cd\u7ec4\u5408\u7d22\u5f15\uff0c\u7d22\u5f15\u6587\u4ef6\u7684\u4f1a\u81a8\u80c0\u5f88\u5feb\u3002\u7d22\u5f15\u53ea\u662f\u63d0\u9ad8\u6548\u7387\u7684\u4e00\u4e2a\u56e0\u7d20\uff0c\u5982\u679c\u4f60\u7684MySQL\u6709\u5927\u6570\u636e\u91cf\u7684\u8868\uff0c\u5c31\u9700\u8981\u82b1\u65f6\u95f4\u7814\u7a76\u5efa\u7acb\u6700\u4f18\u79c0\u7684\u7d22\u5f15\uff0c\u6216\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u603b\u7ed3\u4ee5\u53ca\u6536\u85cf\u7684MySQL\u7d22\u5f15\u7684\u6ce8\u610f\u4e8b\u9879\u548c\u4f18\u5316\u65b9\u6cd5\u3002<\/p>\n

1. \u4f55\u65f6\u4f7f\u7528\u805a\u96c6\u7d22\u5f15\u6216\u975e\u805a\u96c6\u7d22\u5f15\uff1f<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u52a8\u4f5c\u63cf\u8ff0<\/strong><\/td>\n\u4f7f\u7528\u805a\u96c6\u7d22\u5f15<\/strong><\/td>\n\u4f7f\u7528\u975e\u805a\u96c6\u7d22\u5f15<\/strong><\/td>\n<\/tr>\n
\u5217\u7ecf\u5e38\u88ab\u5206\u7ec4\u6392\u5e8f<\/td>\n\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n
\u8fd4\u56de\u67d0\u8303\u56f4\u5185\u7684\u6570\u636e<\/td>\n\u4f7f\u7528<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n<\/tr>\n
\u4e00\u4e2a\u6216\u6781\u5c11\u4e0d\u540c\u503c<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n<\/tr>\n
\u5c0f\u6570\u76ee\u7684\u4e0d\u540c\u503c<\/td>\n\u4f7f\u7528<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n<\/tr>\n
\u5927\u6570\u76ee\u7684\u4e0d\u540c\u503c<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n
\u9891\u7e41\u66f4\u65b0\u7684\u5217<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n
\u5916\u952e\u5217<\/td>\n\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n
\u4e3b\u952e\u5217<\/td>\n\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n
\u9891\u7e41\u4fee\u6539\u7d22\u5f15\u5217<\/td>\n\u4e0d\u4f7f\u7528<\/td>\n\u4f7f\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8b\u5b9e\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u524d\u9762\u805a\u96c6\u7d22\u5f15\u548c\u975e\u805a\u96c6\u7d22\u5f15\u7684\u5b9a\u4e49\u7684\u4f8b\u5b50\u6765\u7406\u89e3\u4e0a\u8868\u3002\u5982\uff1a\u8fd4\u56de\u67d0\u8303\u56f4\u5185\u7684\u6570\u636e\u4e00\u9879\u3002\u6bd4\u5982\u60a8\u7684\u67d0\u4e2a\u8868\u6709\u4e00\u4e2a\u65f6\u95f4\u5217\uff0c\u6070\u597d\u60a8\u628a\u805a\u5408\u7d22\u5f15\u5efa\u7acb\u5728\u4e86\u8be5\u5217\uff0c\u8fd9\u65f6\u60a8\u67e5\u8be22004\u5e741\u67081\u65e5\u81f32004\u5e7410\u67081\u65e5\u4e4b\u95f4\u7684\u5168\u90e8\u6570\u636e\u65f6\uff0c\u8fd9\u4e2a\u901f\u5ea6\u5c31\u5c06\u662f\u5f88\u5feb\u7684\uff0c\u56e0\u4e3a\u60a8\u7684\u8fd9\u672c\u5b57\u5178\u6b63\u6587\u662f\u6309\u65e5\u671f\u8fdb\u884c\u6392\u5e8f\u7684\uff0c\u805a\u7c7b\u7d22\u5f15\u53ea\u9700\u8981\u627e\u5230\u8981\u68c0\u7d22\u7684\u6240\u6709\u6570\u636e\u4e2d\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\u6570\u636e\u5373\u53ef\uff1b\u800c\u4e0d\u50cf\u975e\u805a\u96c6\u7d22\u5f15\uff0c\u5fc5\u987b\u5148\u67e5\u5230\u76ee\u5f55\u4e2d\u67e5\u5230\u6bcf\u4e00\u9879\u6570\u636e\u5bf9\u5e94\u7684\u9875\u7801\uff0c\u7136\u540e\u518d\u6839\u636e\u9875\u7801\u67e5\u5230\u5177\u4f53\u5185\u5bb9\u3002\u5176\u5b9e\u8fd9\u4e2a\u5177\u4f53\u7528\u6cd5\u6211\u8fd8\u4e0d\u662f\u5f88\u7406\u89e3\uff0c\u53ea\u80fd\u7b49\u5f85\u540e\u671f\u7684\u9879\u76ee\u5f00\u53d1\u4e2d\u6162\u6162\u5b66\u5b66\u4e86\u3002<\/p>\n

2. \u7d22\u5f15\u4e0d\u4f1a\u5305\u542b\u6709NULL\u503c\u7684\u5217<\/strong><\/p>\n

\u53ea\u8981\u5217\u4e2d\u5305\u542b\u6709NULL\u503c\u90fd\u5c06\u4e0d\u4f1a\u88ab\u5305\u542b\u5728\u7d22\u5f15\u4e2d\uff0c\u590d\u5408\u7d22\u5f15\u4e2d\u53ea\u8981\u6709\u4e00\u5217\u542b\u6709NULL\u503c\uff0c\u90a3\u4e48\u8fd9\u4e00\u5217\u5bf9\u4e8e\u6b64\u590d\u5408\u7d22\u5f15\u5c31\u662f\u65e0\u6548\u7684\u3002\u6240\u4ee5\u6211\u4eec\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u65f6\u4e0d\u8981\u8ba9\u5b57\u6bb5\u7684\u9ed8\u8ba4\u503c\u4e3aNULL\u3002<\/p>\n

3. \u4f7f\u7528\u77ed\u7d22\u5f15<\/strong><\/p>\n

\u5bf9\u4e32\u5217\u8fdb\u884c\u7d22\u5f15\uff0c\u5982\u679c\u53ef\u80fd\u5e94\u8be5\u6307\u5b9a\u4e00\u4e2a\u524d\u7f00\u957f\u5ea6\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2aCHAR(255)\u7684\u5217\uff0c\u5982\u679c\u5728\u524d10\u4e2a\u621620\u4e2a\u5b57\u7b26\u5185\uff0c\u591a\u6570\u503c\u662f\u60df\u4e00\u7684\uff0c\u90a3\u4e48\u5c31\u4e0d\u8981\u5bf9\u6574\u4e2a\u5217\u8fdb\u884c\u7d22\u5f15\u3002\u77ed\u7d22\u5f15\u4e0d\u4ec5\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u800c\u4e14\u53ef\u4ee5\u8282\u7701\u78c1\u76d8\u7a7a\u95f4\u548cI\/O\u64cd\u4f5c\u3002<\/p>\n

4. \u7d22\u5f15\u5217\u6392\u5e8f<\/strong><\/p>\n

MySQL\u67e5\u8be2\u53ea\u4f7f\u7528\u4e00\u4e2a\u7d22\u5f15\uff0c\u56e0\u6b64\u5982\u679cwhere\u5b50\u53e5\u4e2d\u5df2\u7ecf\u4f7f\u7528\u4e86\u7d22\u5f15\u7684\u8bdd\uff0c\u90a3\u4e48order by\u4e2d\u7684\u5217\u662f\u4e0d\u4f1a\u4f7f\u7528\u7d22\u5f15\u7684\u3002\u56e0\u6b64\u6570\u636e\u5e93\u9ed8\u8ba4\u6392\u5e8f\u53ef\u4ee5\u7b26\u5408\u8981\u6c42\u7684\u60c5\u51b5\u4e0b\u4e0d\u8981\u4f7f\u7528\u6392\u5e8f\u64cd\u4f5c\uff1b\u5c3d\u91cf\u4e0d\u8981\u5305\u542b\u591a\u4e2a\u5217\u7684\u6392\u5e8f\uff0c\u5982\u679c\u9700\u8981\u6700\u597d\u7ed9\u8fd9\u4e9b\u5217\u521b\u5efa\u590d\u5408\u7d22\u5f15\u3002<\/p>\n

5. like\u8bed\u53e5\u64cd\u4f5c<\/strong><\/p>\n

\u4e00\u822c\u60c5\u51b5\u4e0b\u4e0d\u9f13\u52b1\u4f7f\u7528like\u64cd\u4f5c\uff0c\u5982\u679c\u975e\u4f7f\u7528\u4e0d\u53ef\uff0c\u5982\u4f55\u4f7f\u7528\u4e5f\u662f\u4e00\u4e2a\u95ee\u9898\u3002like \u201c%aaa%\u201d \u4e0d\u4f1a\u4f7f\u7528\u7d22\u5f15\u800clike \u201caaa%\u201d\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u3002<\/p>\n

6. \u4e0d\u8981\u5728\u5217\u4e0a\u8fdb\u884c\u8fd0\u7b97<\/strong><\/p>\n

\u4f8b\u5982\uff1aselect * from users where YEAR(adddate)<2007\uff0c\u5c06\u5728\u6bcf\u4e2a\u884c\u4e0a\u8fdb\u884c\u8fd0\u7b97\uff0c\u8fd9\u5c06\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u800c\u8fdb\u884c\u5168\u8868\u626b\u63cf\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u6539\u6210\uff1aselect * from users where adddate<\u20192007-01-01\u2032\u3002\u5173\u4e8e\u8fd9\u4e00\u70b9\u53ef\u4ee5\u56f4\u89c2\uff1a\u4e00\u4e2a\u5355\u5f15\u53f7\u5f15\u53d1\u7684MYSQL\u6027\u80fd\u635f\u5931\u3002<\/a><\/p>\n

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