{"id":75900,"date":"2024-10-16T02:10:16","date_gmt":"2024-10-15T18:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75900\/"},"modified":"2024-10-16T02:10:16","modified_gmt":"2024-10-15T18:10:16","slug":"mysql-%e5%96%ae%e5%88%97%e7%b4%a2%e5%bc%95%e5%92%8c%e7%b5%84%e5%90%88%e7%b4%a2%e5%bc%95%e7%9a%84%e5%8d%80%e5%88%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75900\/","title":{"rendered":"MySQL \u55ae\u5217\u7d22\u5f15\u548c\u7d44\u5408\u7d22\u5f15\u7684\u5340\u5225"},"content":{"rendered":"

MySQL \u55ae\u5217\u7d22\u5f15\u548c\u7d44\u5408\u7d22\u5f15\u7684\u5340\u5225<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002MySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5176\u4e2d\u6700\u5e38\u898b\u7684\u5305\u62ec\u55ae\u5217\u7d22\u5f15\u548c\u7d44\u5408\u7d22\u5f15\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u7a2e\u7d22\u5f15\u7684\u5340\u5225\u53ca\u5176\u9069\u7528\u5834\u666f\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u55ae\u5217\u7d22\u5f15\uff1f<\/h2>\n

\u55ae\u5217\u7d22\u5f15\u662f\u6307\u5728\u6578\u64da\u8868\u4e2d\u7684\u67d0\u4e00\u5217\u4e0a\u5275\u5efa\u7684\u7d22\u5f15\u3002\u9019\u7a2e\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u5c0d\u8a72\u5217\u7684\u67e5\u8a62\u64cd\u4f5c\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u7b49\u503c\u67e5\u8a62\u6216\u7bc4\u570d\u67e5\u8a62\u6642\u3002\u55ae\u5217\u7d22\u5f15\u7684\u5275\u5efa\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

CREATE INDEX index_name ON table_name (column_name);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba users<\/code> \u7684\u8868\uff0c\u5305\u542b id<\/code> \u548c email<\/code> \u5169\u5217\u3002\u5982\u679c\u6211\u5011\u5e0c\u671b\u52a0\u901f\u5c0d email<\/code> \u5217\u7684\u67e5\u8a62\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u55ae\u5217\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_email ON users (email);<\/code><\/pre>\n
\u4ec0\u9ebc\u662f\u7d44\u5408\u7d22\u5f15\uff1f<\/h2>\n
\u7d44\u5408\u7d22\u5f15\u662f\u6307\u5728\u6578\u64da\u8868\u4e2d\u7684\u591a\u500b\u5217\u4e0a\u5275\u5efa\u7684\u7d22\u5f15\u3002\u9019\u7a2e\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u5c0d\u591a\u500b\u5217\u7684\u67e5\u8a62\u64cd\u4f5c\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u591a\u5217\u689d\u4ef6\u67e5\u8a62\u6642\u3002\u7d44\u5408\u7d22\u5f15\u7684\u5275\u5efa\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
CREATE INDEX index_name ON table_name (column1, column2, ...);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u52a0\u901f\u5c0d users<\/code> \u8868\u4e2d first_name<\/code> \u548c last_name<\/code> \u5169\u5217\u7684\u67e5\u8a62\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u7d44\u5408\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_name ON users (first_name, last_name);<\/code><\/pre>\n
\u55ae\u5217\u7d22\u5f15\u8207\u7d44\u5408\u7d22\u5f15\u7684\u5340\u5225<\/h2>\n
1. \u7d22\u5f15\u7684\u7d50\u69cb<\/h3>\n
\u55ae\u5217\u7d22\u5f15\u50c5\u91dd\u5c0d\u4e00\u500b\u5217\u9032\u884c\u7d22\u5f15\uff0c\u800c\u7d44\u5408\u7d22\u5f15\u5247\u91dd\u5c0d\u591a\u500b\u5217\u9032\u884c\u7d22\u5f15\u3002\u9019\u610f\u5473\u8457\u7d44\u5408\u7d22\u5f15\u7684\u7d50\u69cb\u66f4\u70ba\u8907\u96dc\uff0c\u80fd\u5920\u540c\u6642\u8003\u616e\u591a\u500b\u5217\u7684\u503c\u3002<\/p>\n
2. \u67e5\u8a62\u6548\u7387<\/h3>\n
\u55ae\u5217\u7d22\u5f15\u5728\u67e5\u8a62\u55ae\u500b\u5217\u6642\u6548\u7387\u8f03\u9ad8\uff0c\u4f46\u5728\u67e5\u8a62\u591a\u500b\u5217\u6642\uff0c\u5247\u53ef\u80fd\u7121\u6cd5\u5145\u5206\u5229\u7528\u3002\u800c\u7d44\u5408\u7d22\u5f15\u5247\u80fd\u5920\u5728\u67e5\u8a62\u591a\u500b\u5217\u6642\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u7576\u67e5\u8a62\u689d\u4ef6\u5305\u542b\u7d22\u5f15\u4e2d\u7684\u6240\u6709\u5217\u6642\u3002<\/p>\n
3. \u4f7f\u7528\u5834\u666f<\/h3>\n
\u55ae\u5217\u7d22\u5f15\u9069\u5408\u65bc\u7d93\u5e38\u55ae\u7368\u67e5\u8a62\u7684\u5217\uff0c\u4f8b\u5982\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u800c\u7d44\u5408\u7d22\u5f15\u5247\u9069\u5408\u65bc\u7d93\u5e38\u4e00\u8d77\u67e5\u8a62\u7684\u5217\uff0c\u4f8b\u5982\u7528\u6236\u7684\u59d3\u540d\u548c\u5e74\u9f61\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
4. \u7a7a\u9593\u4f54\u7528<\/h3>\n
\u7531\u65bc\u7d44\u5408\u7d22\u5f15\u5305\u542b\u591a\u500b\u5217\u7684\u6578\u64da\uff0c\u56e0\u6b64\u5176\u4f54\u7528\u7684\u7a7a\u9593\u901a\u5e38\u5927\u65bc\u55ae\u5217\u7d22\u5f15\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u9700\u8981\u8003\u616e\u5230\u7d22\u5f15\u7684\u7a7a\u9593\u4f54\u7528\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8cc7\u6e90\u6d6a\u8cbb\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728 MySQL \u4e2d\uff0c\u55ae\u5217\u7d22\u5f15\u548c\u7d44\u5408\u7d22\u5f15\u5404\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u55ae\u5217\u7d22\u5f15\u9069\u5408\u65bc\u55ae\u7368\u67e5\u8a62\u7684\u5217\uff0c\u800c\u7d44\u5408\u7d22\u5f15\u5247\u5728\u591a\u5217\u67e5\u8a62\u4e2d\u8868\u73fe\u66f4\u4f73\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6027\u80fd\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u61c9\u7528\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u904b\u884c\u7684\u7a69\u5b9a\u6027\u548c\u9ad8\u6548\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3MySQL\u4e2d\u55ae\u5217\u7d22\u5f15\u8207\u7d44\u5408\u7d22\u5f15\u7684\u4e3b\u8981\u5340\u5225\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\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-75900","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75900","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=75900"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75900\/revisions"}],"predecessor-version":[{"id":75901,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75900\/revisions\/75901"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}