{"id":76792,"date":"2024-10-16T09:58:14","date_gmt":"2024-10-16T01:58:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76792\/"},"modified":"2024-10-16T09:58:14","modified_gmt":"2024-10-16T01:58:14","slug":"mysql%e7%b4%a2%e5%bc%95%e8%a6%81%e6%b3%a8%e6%84%8f%e7%9a%848%e5%80%8b%e4%ba%8b%e6%83%85","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76792\/","title":{"rendered":"MySql\u7d22\u5f15\u8981\u6ce8\u610f\u76848\u500b\u4e8b\u60c5"},"content":{"rendered":"<h1 id=\"mysql%e7%b4%a2%e5%bc%95%e8%a6%81%e6%b3%a8%e6%84%8f%e7%9a%848%e5%80%8b%e4%ba%8b%e6%83%85-ppTwLWbjXy\">MySQL\u7d22\u5f15\u8981\u6ce8\u610f\u76848\u500b\u4e8b\u60c5<\/h1>\n<p>\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\u4f46\u5982\u679c\u4f7f\u7528\u4e0d\u7576\uff0c\u5247\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728\u4f7f\u7528MySQL\u7d22\u5f15\u6642\u9700\u8981\u6ce8\u610f\u7684\u516b\u500b\u95dc\u9375\u4e8b\u9805\u3002<\/p>\n<h2 id=\"1-%e7%b4%a2%e5%bc%95%e7%9a%84%e9%a1%9e%e5%9e%8b-ppTwLWbjXy\">1. \u7d22\u5f15\u7684\u985e\u578b<\/h2>\n<p>MySQL\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\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\u5408\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>\u9069\u5408\u5c0d\u6587\u672c\u9032\u884c\u641c\u7d22\u3002<\/li>\n<li><strong>\u7a7a\u9593\u7d22\u5f15\uff1a<\/strong>\u7528\u65bc\u5730\u7406\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u5c0d\u65bc\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"2-%e9%81%a9%e7%95%b6%e7%9a%84%e7%b4%a2%e5%bc%95%e6%95%b8%e9%87%8f-ppTwLWbjXy\">2. \u9069\u7576\u7684\u7d22\u5f15\u6578\u91cf<\/h2>\n<p>\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u7684\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6027\u80fd\u3002\u6bcf\u6b21\u5c0d\u8868\u9032\u884c\u5beb\u64cd\u4f5c\u6642\uff0cMySQL\u90fd\u9700\u8981\u66f4\u65b0\u7d22\u5f15\u3002\u56e0\u6b64\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u5408\u7406\u8a2d\u7f6e\u7d22\u5f15\u6578\u91cf\u3002<\/p>\n<h2 id=\"3-%e7%b4%a2%e5%bc%95%e7%9a%84%e9%81%b8%e6%93%87%e6%80%a7-ppTwLWbjXy\">3. \u7d22\u5f15\u7684\u9078\u64c7\u6027<\/h2>\n<p>\u7d22\u5f15\u7684\u9078\u64c7\u6027\u662f\u6307\u7d22\u5f15\u4e2d\u552f\u4e00\u503c\u7684\u6bd4\u4f8b\u3002\u9078\u64c7\u6027\u8d8a\u9ad8\uff0c\u7d22\u5f15\u7684\u6548\u679c\u8d8a\u597d\u3002\u901a\u5e38\uff0c\u5c0d\u65bc\u9ad8\u9078\u64c7\u6027\u7684\u5217\uff08\u5982\u7528\u6236ID\uff09\uff0c\u5efa\u7acb\u7d22\u5f15\u662f\u6709\u76ca\u7684\uff1b\u800c\u5c0d\u65bc\u4f4e\u9078\u64c7\u6027\u7684\u5217\uff08\u5982\u6027\u5225\uff09\uff0c\u5247\u53ef\u80fd\u4e0d\u9700\u8981\u7d22\u5f15\u3002<\/p>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e8%a4%87%e5%90%88%e7%b4%a2%e5%bc%95-ppTwLWbjXy\">4. \u4f7f\u7528\u8907\u5408\u7d22\u5f15<\/h2>\n<p>\u8907\u5408\u7d22\u5f15\u662f\u7531\u591a\u500b\u5217\u7d44\u6210\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u63d0\u9ad8\u591a\u5217\u67e5\u8a62\u7684\u6027\u80fd\u3002\u5728\u5275\u5efa\u8907\u5408\u7d22\u5f15\u6642\uff0c\u61c9\u5c07\u6700\u5e38\u7528\u7684\u67e5\u8a62\u689d\u4ef6\u653e\u5728\u524d\u9762\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_name ON users (last_name, first_name);<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u52a0\u901f\u5c0d\u7528\u6236\u8868\u7684\u67e5\u8a62\u3002<\/p>\n<h2 id=\"5-%e9%81%bf%e5%85%8d%e5%9c%a8%e9%a0%bb%e7%b9%81%e6%9b%b4%e6%96%b0%e7%9a%84%e5%88%97%e4%b8%8a%e5%bb%ba%e7%ab%8b%e7%b4%a2%e5%bc%95-ppTwLWbjXy\">5. \u907f\u514d\u5728\u983b\u7e41\u66f4\u65b0\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15<\/h2>\n<p>\u5982\u679c\u67d0\u500b\u5217\u7d93\u5e38\u88ab\u66f4\u65b0\uff0c\u5247\u5728\u8a72\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u56e0\u70ba\u6bcf\u6b21\u66f4\u65b0\u90fd\u9700\u8981\u91cd\u65b0\u8a08\u7b97\u7d22\u5f15\uff0c\u9019\u6703\u589e\u52a0\u984d\u5916\u7684\u958b\u92b7\u3002<\/p>\n<h2 id=\"6-%e5%ae%9a%e6%9c%9f%e6%aa%a2%e6%9f%a5%e5%92%8c%e9%87%8d%e5%bb%ba%e7%b4%a2%e5%bc%95-ppTwLWbjXy\">6. \u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u5efa\u7d22\u5f15<\/h2>\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\u6aa2\u67e5\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u4e26\u6839\u64da\u9700\u8981\u91cd\u5efa\u6216\u522a\u9664\u4e0d\u518d\u4f7f\u7528\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"7-%e4%bd%bf%e7%94%a8explain%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2-ppTwLWbjXy\">7. \u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86EXPLAIN\u547d\u4ee4\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u901a\u904eEXPLAIN\uff0c\u53ef\u4ee5\u4e86\u89e3\u67e5\u8a62\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\uff0c\u4e26\u6839\u64da\u7d50\u679c\u9032\u884c\u512a\u5316\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE last_name = 'Smith';<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<h2 id=\"8-%e6%b3%a8%e6%84%8f%e7%b4%a2%e5%bc%95%e7%9a%84%e5%ad%98%e5%84%b2%e6%88%90%e6%9c%ac-ppTwLWbjXy\">8. \u6ce8\u610f\u7d22\u5f15\u7684\u5b58\u5132\u6210\u672c<\/h2>\n<p>\u7d22\u5f15\u6703\u4f54\u7528\u984d\u5916\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u5eab\u4e2d\u3002\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u8003\u616e\u7d22\u5f15\u7684\u5b58\u5132\u6210\u672c\uff0c\u4e26\u6839\u64da\u5be6\u969b\u9700\u6c42\u9032\u884c\u5408\u7406\u914d\u7f6e\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ppTwLWbjXy\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7136\u800c\uff0c\u6b63\u78ba\u7684\u4f7f\u7528\u548c\u7ba1\u7406\u7d22\u5f15\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4e86\u89e3\u7d22\u5f15\u7684\u985e\u578b\u3001\u9078\u64c7\u6027\u3001\u8907\u5408\u7d22\u5f15\u7684\u4f7f\u7528\u3001\u4ee5\u53ca\u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u5efa\u7d22\u5f15\u7b49\u65b9\u9762\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u512a\u5316\u60a8\u7684\u6578\u64da\u5eab\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u7d22\u5f15\u76848\u4e2a\u5173\u952e\u6ce8\u610f\u4e8b\u9879\uff0c\u4f18\u5316\u67e5\u8be2\u6027\u80fd\uff0c\u63d0\u5347\u6570\u636e\u5e93\u6548\u7387\uff0c\u907f\u514d\u5e38\u89c1\u9519\u8bef\uff0c\u786e\u4fdd\u6570\u636e\u7ba1\u7406\u987a\u7545\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-76792","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76792","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=76792"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76792\/revisions"}],"predecessor-version":[{"id":76793,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76792\/revisions\/76793"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}