{"id":186222,"date":"2024-11-11T04:07:18","date_gmt":"2024-11-10T20:07:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186222\/"},"modified":"2024-11-11T04:07:19","modified_gmt":"2024-11-10T20:07:19","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%ac%e8%a9%a6%ef%bc%9a%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e8%88%87%e6%87%89%e7%94%a8%e5%af%a6%e8%b8%90%ef%bc%88%e6%b8%ac%e8%a9%a6%e7%b4%a2%e5%bc%95%e7%94%a8%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186222\/","title":{"rendered":"\u6578\u64da\u5eab\u6e2c\u8a66\uff1a\u7d22\u5f15\u512a\u5316\u8207\u61c9\u7528\u5be6\u8e10\uff08\u6e2c\u8a66\u7d22\u5f15\u7528\u6578\u64da\u5eab\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%ac%e8%a9%a6%ef%bc%9a%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e8%88%87%e6%87%89%e7%94%a8%e5%af%a6%e8%b8%90%ef%bc%88%e6%b8%ac%e8%a9%a6%e7%b4%a2%e5%bc%95%e7%94%a8%e6%95%b8-PvuYriDbXJ\">\u6578\u64da\u5eab\u6e2c\u8a66\uff1a\u7d22\u5f15\u512a\u5316\u8207\u61c9\u7528\u5be6\u8e10\uff08\u6e2c\u8a66\u7d22\u5f15\u7528\u6578\u64da\u5eab\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u67e5\u8a62\u548c\u7ba1\u7406\u9019\u4e9b\u6578\u64da\u6210\u70ba\u4e86\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u7d22\u5f15\u4f5c\u70ba\u6578\u64da\u5eab\u4e2d\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u7d22\u5f15\u7684\u512a\u5316\u53ca\u5176\u5728\u6578\u64da\u5eab\u6e2c\u8a66\u4e2d\u7684\u61c9\u7528\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-PvuYriDbXJ\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u901f\u5ea6\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u884c\u3002\u7d22\u5f15\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u5217\u5275\u5efa\uff0c\u4e26\u4e14\u53ef\u4ee5\u662f\u552f\u4e00\u7684\u6216\u975e\u552f\u4e00\u7684\u3002\u5e38\u898b\u7684\u7d22\u5f15\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>B-Tree\u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\uff0c\u9069\u7528\u65bc\u7bc4\u570d\u67e5\u8a62\u3002<\/li>\n<li><strong>\u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u7cbe\u78ba\u67e5\u8a62\uff0c\u4f46\u4e0d\u652f\u6301\u7bc4\u570d\u67e5\u8a62\u3002<\/li>\n<li><strong>\u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u7528\u65bc\u6587\u672c\u641c\u7d22\uff0c\u80fd\u5920\u63d0\u9ad8\u5c0d\u5927\u6587\u672c\u5b57\u6bb5\u7684\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e5%84%aa%e5%8c%96-PvuYriDbXJ\">\u7d22\u5f15\u7684\u512a\u5316<\/h2>\n<p>\u96d6\u7136\u7d22\u5f15\u80fd\u5920\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u904e\u591a\u6216\u4e0d\u7576\u7684\u7d22\u5f15\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u56e0\u6b64\uff0c\u7d22\u5f15\u7684\u512a\u5316\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u7d22\u5f15\u7684\u5be6\u8e10\u5efa\u8b70\uff1a<\/p>\n<h3 id=\"1-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e6%a8%a1%e5%bc%8f-PvuYriDbXJ\">1. \u5206\u6790\u67e5\u8a62\u6a21\u5f0f<\/h3>\n<p>\u5728\u5275\u5efa\u7d22\u5f15\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5206\u6790\u61c9\u7528\u7a0b\u5e8f\u7684\u67e5\u8a62\u6a21\u5f0f\u3002\u4f7f\u7528\u6578\u64da\u5eab\u7684\u67e5\u8a62\u5206\u6790\u5de5\u5177\uff08\u5982 MySQL \u7684 EXPLAIN \u8a9e\u53e5\uff09\u4f86\u67e5\u770b\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u627e\u51fa\u6700\u5e38\u7528\u7684\u67e5\u8a62\u548c\u904e\u6162\u7684\u67e5\u8a62\uff0c\u5f9e\u800c\u6c7a\u5b9a\u9700\u8981\u5275\u5efa\u54ea\u4e9b\u7d22\u5f15\u3002<\/p>\n<h3 id=\"2-%e9%81%a9%e7%95%b6%e9%81%b8%e6%93%87%e7%b4%a2%e5%bc%95%e5%88%97-PvuYriDbXJ\">2. \u9069\u7576\u9078\u64c7\u7d22\u5f15\u5217<\/h3>\n<p>\u9078\u64c7\u7d22\u5f15\u5217\u6642\uff0c\u61c9\u8003\u616e\u5217\u7684\u9078\u64c7\u6027\uff08\u5373\u4e0d\u540c\u503c\u7684\u6578\u91cf\uff09\u3002\u9ad8\u9078\u64c7\u6027\u7684\u5217\u66f4\u9069\u5408\u7528\u4f5c\u7d22\u5f15\uff0c\u56e0\u70ba\u5b83\u5011\u80fd\u5920\u66f4\u6709\u6548\u5730\u7e2e\u5c0f\u67e5\u8a62\u7bc4\u570d\u3002<\/p>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e9%87%8d%e5%bb%ba%e7%b4%a2%e5%bc%95-PvuYriDbXJ\">3. \u5b9a\u671f\u91cd\u5efa\u7d22\u5f15<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\u548c\u8b8a\u5316\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u5e6b\u52a9\u7dad\u6301\u5176\u6027\u80fd\u3002\u8a31\u591a\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u81ea\u52d5\u91cd\u5efa\u7d22\u5f15\u7684\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e6%87%89%e7%94%a8%e5%af%a6%e8%b8%90-PvuYriDbXJ\">\u7d22\u5f15\u7684\u61c9\u7528\u5be6\u8e10<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7d22\u5f15\u7684\u4f7f\u7528\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 MySQL \u4e2d\u5275\u5efa\u548c\u4f7f\u7528\u7d22\u5f15\uff1a<\/p>\n<pre><code>-- \u5275\u5efa\u4e00\u500b\u540d\u70ba idx_user_email \u7684\u7d22\u5f15\nCREATE INDEX idx_user_email ON users(email);\n\n-- \u4f7f\u7528\u7d22\u5f15\u9032\u884c\u67e5\u8a62\nSELECT * FROM users WHERE email = 'example@example.com';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u901a\u904e\u5728 email \u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u67e5\u8a62\u6027\u80fd\u5f97\u5230\u4e86\u986f\u8457\u63d0\u5347\u3002\u7576\u6578\u64da\u91cf\u589e\u5927\u6642\uff0c\u9019\u7a2e\u512a\u5316\u7684\u6548\u679c\u6703\u66f4\u52a0\u660e\u986f\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-PvuYriDbXJ\">\u7d50\u8ad6<\/h2>\n<p>\u7d22\u5f15\u512a\u5316\u662f\u6578\u64da\u5eab\u6027\u80fd\u8abf\u512a\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u5408\u7406\u7684\u7d22\u5f15\u8a2d\u8a08\u548c\u5b9a\u671f\u7684\u7dad\u8b77\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u61c9\u7528\u6027\u80fd\u3002\u5728\u9032\u884c\u6578\u64da\u5eab\u6e2c\u8a66\u6642\uff0c\u61c9\u5145\u5206\u8003\u616e\u7d22\u5f15\u7684\u5f71\u97ff\uff0c\u4e26\u6839\u64da\u5be6\u969b\u9700\u6c42\u9032\u884c\u8abf\u6574\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u63d0\u5347\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eab\u6e2c\u8a66\u4e2d\u7684\u7d22\u5f15\u512a\u5316\u6280\u8853\u53ca\u5176\u61c9\u7528\u5be6\u8e10\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u6027\u80fd\u6700\u4f73\u5316\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-186222","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186222","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=186222"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186222\/revisions"}],"predecessor-version":[{"id":186223,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186222\/revisions\/186223"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}