{"id":194111,"date":"2024-11-13T03:51:19","date_gmt":"2024-11-12T19:51:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/194111\/"},"modified":"2024-11-13T03:51:20","modified_gmt":"2024-11-12T19:51:20","slug":"%e4%b8%80%e7%af%87%e5%b8%b6%e7%b5%a6%e4%bd%a0mysql%e7%b4%a2%e5%bc%95%e7%9f%a5%e8%ad%98%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/194111\/","title":{"rendered":"\u4e00\u7bc7\u5e36\u7d66\u4f60MySQL\u7d22\u5f15\u77e5\u8b58\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"%e4%b8%80%e7%af%87%e5%b8%b6%e7%b5%a6%e4%bd%a0mysql%e7%b4%a2%e5%bc%95%e7%9f%a5%e8%ad%98%e8%a9%b3%e8%a7%a3-cUzYPcNMRM\">\u4e00\u7bc7\u5e36\u7d66\u4f60MySQL\u7d22\u5f15\u77e5\u8b58\u8a73\u89e3<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u7279\u5225\u662f\u5728MySQL\u4e2d\u3002\u7d22\u5f15\u7684\u4e3b\u8981\u76ee\u7684\u662f\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u6e1b\u5c11\u6578\u64da\u6aa2\u7d22\u7684\u6642\u9593\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u7d22\u5f15\u7684\u57fa\u672c\u6982\u5ff5\u3001\u985e\u578b\u3001\u4f7f\u7528\u65b9\u6cd5\u4ee5\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 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id=\"mysql%e7%b4%a2%e5%bc%95%e7%9a%84%e9%a1%9e%e5%9e%8b-cUzYPcNMRM\">MySQL\u7d22\u5f15\u7684\u985e\u578b<\/h2>\n<p>MySQL\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u7d22\u5f15\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u4e3b\u9375\u7d22\u5f15\uff08Primary Key Index\uff09<\/strong>: \u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\u7d22\u5f15\uff0c\u4e3b\u9375\u7d22\u5f15\u7684\u503c\u5fc5\u9808\u552f\u4e00\u4e14\u4e0d\u80fd\u70baNULL\u3002<\/li>\n<li><strong>\u552f\u4e00\u7d22\u5f15\uff08Unique Index\uff09<\/strong>: \u552f\u4e00\u7d22\u5f15\u7684\u503c\u5fc5\u9808\u552f\u4e00\uff0c\u4f46\u53ef\u4ee5\u5305\u542bNULL\u503c\u3002<\/li>\n<li><strong>\u666e\u901a\u7d22\u5f15\uff08Index\uff09<\/strong>: \u666e\u901a\u7d22\u5f15\u4e0d\u8981\u6c42\u552f\u4e00\u6027\uff0c\u4e3b\u8981\u7528\u65bc\u52a0\u901f\u67e5\u8a62\u3002<\/li>\n<li><strong>\u5168\u6587\u7d22\u5f15\uff08Fulltext Index\uff09<\/strong>: \u4e3b\u8981\u7528\u65bc\u5c0d\u6587\u672c\u9032\u884c\u5168\u6587\u641c\u7d22\uff0c\u9069\u5408\u65bc\u5927\u6587\u672c\u5b57\u6bb5\u3002<\/li>\n<li><strong>\u8907\u5408\u7d22\u5f15\uff08Composite Index\uff09<\/strong>: \u7531\u591a\u500b\u5217\u7d44\u6210\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u63d0\u9ad8\u591a\u5217\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-cUzYPcNMRM\">\u5982\u4f55\u5275\u5efa\u7d22\u5f15<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528CREATE INDEX\u8a9e\u53e5\u4f86\u5275\u5efa\u7d22\u5f15\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u666e\u901a\u7d22\u5f15\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_name ON users (name);<\/code><\/pre>\n<p>\u5982\u679c\u8981\u5275\u5efa\u4e00\u500b\u552f\u4e00\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE UNIQUE INDEX idx_email ON users (email);<\/code><\/pre>\n<p>\u5c0d\u65bc\u8907\u5408\u7d22\u5f15\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\uff1a<\/p>\n<pre><code>CREATE INDEX idx_name_email ON users (name, email);<\/code><\/pre>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-cUzYPcNMRM\">\u7d22\u5f15\u7684\u512a\u7f3a\u9ede<\/h2>\n<p>\u96d6\u7136\u7d22\u5f15\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u5b83\u5011\u4e5f\u6709\u4e00\u4e9b\u7f3a\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u4f54\u7528\u7a7a\u9593<\/strong>: \u6bcf\u500b\u7d22\u5f15\u90fd\u9700\u8981\u984d\u5916\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u9f90\u5927\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u5f71\u97ff\u5beb\u5165\u6027\u80fd<\/strong>: \u5728\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u6578\u64da\u6642\uff0c\u7d22\u5f15\u4e5f\u9700\u8981\u88ab\u66f4\u65b0\uff0c\u9019\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-cUzYPcNMRM\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528MySQL\u7d22\u5f15\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u5e6b\u52a9\u4f60\u66f4\u6709\u6548\u5730\u7ba1\u7406\u7d22\u5f15\uff1a<\/p>\n<ul>\n<li>\u50c5\u5728\u9700\u8981\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u907f\u514d\u904e\u591a\u7684\u7d22\u5f15\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u7d22\u5f15\uff0c\u522a\u9664\u4e0d\u518d\u4f7f\u7528\u7684\u7d22\u5f15\u3002<\/li>\n<li>\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u6027\u80fd\uff0c\u78ba\u4fdd\u7d22\u5f15\u7684\u6709\u6548\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cUzYPcNMRM\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\u7684\u91cd\u8981\u5de5\u5177\uff0c\u4e86\u89e3\u5176\u985e\u578b\u3001\u5275\u5efa\u65b9\u6cd5\u53ca\u512a\u7f3a\u9ede\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u5408\u7406\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u67e5\u8a62\u6027\u80fd\uff0c\u6e1b\u5c11\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d88\u8017\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u4f60\u7684MySQL\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\u901f\u5ea6\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3MySQL\u7d22\u5f15\u7684\u904b\u4f5c\u539f\u7406\u3001\u985e\u578b\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u512a\u5316\u67e5\u8a62\u6548\u7387\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-194111","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194111","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=194111"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194111\/revisions"}],"predecessor-version":[{"id":194112,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194111\/revisions\/194112"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=194111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=194111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=194111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}