{"id":162891,"date":"2024-11-04T18:53:20","date_gmt":"2024-11-04T10:53:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162891\/"},"modified":"2024-11-04T18:53:21","modified_gmt":"2024-11-04T10:53:21","slug":"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95mysql%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162891\/","title":{"rendered":"\u6559\u60a8\u5982\u4f55mysql\u7d22\u5f15\u512a\u5316"},"content":{"rendered":"

\u6559\u60a8\u5982\u4f55MySQL\u7d22\u5f15\u512a\u5316<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5b83\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u7d22\u5f15\u7684\u512a\u5316\u65b9\u6cd5\uff0c\u5e6b\u52a9\u60a8\u63d0\u5347\u6578\u64da\u5eab\u7684\u6548\u7387\u3002<\/p>\n

\u4ec0\u9ebc\u662fMySQL\u7d22\u5f15\uff1f<\/h2>\n

MySQL\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002\u7d22\u5f15\u53ef\u4ee5\u662f\u55ae\u5217\u7d22\u5f15\u6216\u591a\u5217\u7d22\u5f15\uff0c\u4e26\u4e14\u53ef\u4ee5\u57fa\u65bc\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u9032\u884c\u5275\u5efa\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u9700\u8981\u512a\u5316\u7d22\u5f15\uff1f<\/h2>\n

\u96d6\u7136\u7d22\u5f15\u80fd\u5920\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u4f46\u4e0d\u7576\u7684\u7d22\u5f15\u4f7f\u7528\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u904e\u591a\u7684\u7d22\u5f15\u6703\u589e\u52a0\u6578\u64da\u5beb\u5165\u7684\u6210\u672c\uff0c\u56e0\u70ba\u6bcf\u6b21\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u90fd\u9700\u8981\u66f4\u65b0\u7d22\u5f15\u3002\u56e0\u6b64\uff0c\u512a\u5316\u7d22\u5f15\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002<\/p>\n

MySQL\u7d22\u5f15\u512a\u5316\u7684\u7b56\u7565<\/h2>\n

1. \u5206\u6790\u67e5\u8a62<\/h3>\n

\u5728\u512a\u5316\u7d22\u5f15\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5206\u6790\u67e5\u8a62\u7684\u6027\u80fd\u3002\u4f7f\u7528MySQL\u7684EXPLAIN\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u60a8\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u4f8b\u5982\uff1a<\/p>\n

EXPLAIN SELECT * FROM users WHERE age > 30;<\/code><\/pre>\n
\u9019\u5c07\u986f\u793aMySQL\u5982\u4f55\u57f7\u884c\u8a72\u67e5\u8a62\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u7d22\u5f15\u548c\u9810\u8a08\u7684\u884c\u6578\u3002<\/p>\n
2. \u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15<\/h3>\n
\u6839\u64da\u67e5\u8a62\u7684\u7279\u9ede\u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15\u662f\u512a\u5316\u7684\u95dc\u9375\u3002\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u61c9\u8003\u616e\u5275\u5efa\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5982\u679c\u7d93\u5e38\u6839\u64da\u7528\u6236\u5e74\u9f61\u67e5\u8a62\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_age ON users(age);<\/code><\/pre>\n
3. \u4f7f\u7528\u8907\u5408\u7d22\u5f15<\/h3>\n
\u5c0d\u65bc\u6d89\u53ca\u591a\u500b\u5217\u7684\u67e5\u8a62\uff0c\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM users WHERE age > 30 AND city = 'Hong Kong';<\/code><\/pre>\n
\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u8907\u5408\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_age_city ON users(age, city);<\/code><\/pre>\n
4. \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7d22\u5f15<\/h3>\n
\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u5b9a\u671f\u6aa2\u67e5\u4e26\u522a\u9664\u4e0d\u518d\u4f7f\u7528\u7684\u7d22\u5f15\u3002\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u53ef\u4ee5\u67e5\u770b\u7576\u524d\u7684\u7d22\u5f15\uff1a<\/p>\n
SHOW INDEX FROM users;<\/code><\/pre>\n
5. \u8003\u616e\u4f7f\u7528\u5168\u6587\u7d22\u5f15<\/h3>\n
\u5c0d\u65bc\u9700\u8981\u9032\u884c\u6587\u672c\u641c\u7d22\u7684\u5834\u666f\uff0c\u4f7f\u7528\u5168\u6587\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE FULLTEXT INDEX idx_description ON products(description);<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u52a0\u901f\u5c0d\u7522\u54c1\u63cf\u8ff0\u7684\u641c\u7d22\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
MySQL\u7d22\u5f15\u7684\u512a\u5316\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\uff0c\u901a\u904e\u5206\u6790\u67e5\u8a62\u3001\u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15\u3001\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7d22\u5f15\u4ee5\u53ca\u8003\u616e\u5168\u6587\u7d22\u5f15\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5b9a\u671f\u6aa2\u67e5\u548c\u8abf\u6574\u7d22\u5f15\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u9ad8\u6548\u904b\u884c\u7684\u95dc\u9375\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002\u7121\u8ad6\u662f \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f \u96f2\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u512a\u5316MySQL\u7d22\u5f15\uff0c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6e1b\u5c11\u57f7\u884c\u6642\u9593\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u8b93\u60a8\u7684\u61c9\u7528\u904b\u884c\u66f4\u6d41\u66a2\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-162891","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=162891"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162891\/revisions"}],"predecessor-version":[{"id":162892,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162891\/revisions\/162892"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}