{"id":157048,"date":"2024-11-02T21:20:18","date_gmt":"2024-11-02T13:20:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/157048\/"},"modified":"2024-11-02T21:20:19","modified_gmt":"2024-11-02T13:20:19","slug":"%e5%88%86%e4%ba%ab%e5%b9%be%e5%80%8b%e7%b4%a2%e5%bc%95%e5%89%b5%e5%bb%ba%e7%9a%84%e5%b0%8f-tips","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/157048\/","title":{"rendered":"\u5206\u4eab\u5e7e\u500b\u7d22\u5f15\u5275\u5efa\u7684\u5c0f Tips"},"content":{"rendered":"<h1 id=\"%e5%88%86%e4%ba%ab%e5%b9%be%e5%80%8b%e7%b4%a2%e5%bc%95%e5%89%b5%e5%bb%ba%e7%9a%84%e5%b0%8f-tips-YsKSptoLAT\">\u5206\u4eab\u5e7e\u500b\u7d22\u5f15\u5275\u5efa\u7684\u5c0f Tips<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d22\u5f15\u7684\u5275\u5efa\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6b65\u9a5f\u3002\u6b63\u78ba\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u6e1b\u5c11\u6578\u64da\u6aa2\u7d22\u7684\u6642\u9593\u3002\u672c\u6587\u5c07\u5206\u4eab\u5e7e\u500b\u6709\u95dc\u7d22\u5f15\u5275\u5efa\u7684\u5c0f\u6280\u5de7\uff0c\u5e6b\u52a9\u60a8\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-%e7%a2%ba%e5%ae%9a%e7%b4%a2%e5%bc%95%e7%9a%84%e5%bf%85%e8%a6%81%e6%80%a7-YsKSptoLAT\">1. \u78ba\u5b9a\u7d22\u5f15\u7684\u5fc5\u8981\u6027<\/h2>\n<p>\u5728\u5275\u5efa\u7d22\u5f15\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u8a55\u4f30\u5176\u5fc5\u8981\u6027\u3002\u4e26\u975e\u6240\u6709\u7684\u5217\u90fd\u9700\u8981\u7d22\u5f15\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5c0e\u81f4\u6578\u64da\u5eab\u6027\u80fd\u4e0b\u964d\u3002\u60a8\u53ef\u4ee5\u901a\u904e\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u4f86\u78ba\u5b9a\u54ea\u4e9b\u5217\u7d93\u5e38\u88ab\u7528\u65bc\u67e5\u8a62\u689d\u4ef6\u4e2d\uff0c\u9019\u4e9b\u5217\u901a\u5e38\u662f\u7d22\u5f15\u7684\u6700\u4f73\u5019\u9078\u8005\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8%e5%90%88%e9%81%a9%e7%9a%84%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b-YsKSptoLAT\">2. \u4f7f\u7528\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b<\/h2>\n<p>\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u652f\u6301\u4e0d\u540c\u985e\u578b\u7684\u7d22\u5f15\u3002\u5e38\u898b\u7684\u7d22\u5f15\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>B-Tree \u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u7bc4\u570d\u67e5\u8a62\u548c\u6392\u5e8f\u64cd\u4f5c\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<\/ul>\n<p>\u6839\u64da\u60a8\u7684\u67e5\u8a62\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"3-%e8%80%83%e6%85%ae%e7%b4%a2%e5%bc%95%e7%9a%84%e5%88%97%e9%a0%86%e5%ba%8f-YsKSptoLAT\">3. \u8003\u616e\u7d22\u5f15\u7684\u5217\u9806\u5e8f<\/h2>\n<p>\u5728\u5275\u5efa\u8907\u5408\u7d22\u5f15\u6642\uff0c\u5217\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u4e00\u822c\u4f86\u8aaa\uff0c\u61c9\u5c07\u9078\u64c7\u6027\u9ad8\u7684\u5217\u653e\u5728\u7d22\u5f15\u7684\u524d\u9762\u3002\u9078\u64c7\u6027\u9ad8\u7684\u5217\u662f\u6307\u80fd\u5920\u6709\u6548\u5340\u5206\u6578\u64da\u7684\u5217\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u500b\u5217\u7684\u503c\u5728\u6578\u64da\u96c6\u4e2d\u662f\u552f\u4e00\u7684\uff0c\u90a3\u9ebc\u5b83\u7684\u9078\u64c7\u6027\u5c31\u5f88\u9ad8\u3002<\/p>\n<pre><code>CREATE INDEX idx_example ON table_name (high_selectivity_column, low_selectivity_column);<\/code><\/pre>\n<h2 id=\"4-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e7%b4%a2%e5%bc%95-YsKSptoLAT\">4. \u5b9a\u671f\u7dad\u8b77\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\u56e0\u6b64\uff0c\u5b9a\u671f\u7dad\u8b77\u7d22\u5f15\u662f\u5fc5\u8981\u7684\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u6578\u64da\u5eab\u63d0\u4f9b\u7684\u5de5\u5177\u4f86\u91cd\u5efa\u6216\u91cd\u7d44\u7d22\u5f15\uff0c\u4ee5\u4fdd\u6301\u5176\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5728 SQL Server \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u91cd\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>ALTER INDEX ALL ON table_name REBUILD;<\/code><\/pre>\n<h2 id=\"5-%e6%b8%ac%e8%a9%a6%e5%92%8c%e7%9b%a3%e6%8e%a7%e7%b4%a2%e5%bc%95%e6%80%a7%e8%83%bd-YsKSptoLAT\">5. \u6e2c\u8a66\u548c\u76e3\u63a7\u7d22\u5f15\u6027\u80fd<\/h2>\n<p>\u5275\u5efa\u7d22\u5f15\u5f8c\uff0c\u61c9\u8a72\u9032\u884c\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u5176\u6027\u80fd\u7b26\u5408\u9810\u671f\u3002\u53ef\u4ee5\u4f7f\u7528\u6578\u64da\u5eab\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\u4f86\u89c0\u5bdf\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u548c\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u3002\u6839\u64da\u76e3\u63a7\u7d50\u679c\uff0c\u60a8\u53ef\u4ee5\u9032\u4e00\u6b65\u8abf\u6574\u7d22\u5f15\u8a2d\u7f6e\u3002<\/p>\n<h2 id=\"6-%e9%81%bf%e5%85%8d%e9%81%8e%e5%ba%a6%e7%b4%a2%e5%bc%95-YsKSptoLAT\">6. \u907f\u514d\u904e\u5ea6\u7d22\u5f15<\/h2>\n<p>\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5c0e\u81f4\u6578\u64da\u5eab\u7684\u5beb\u5165\u6027\u80fd\u4e0b\u964d\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\u61c9\u8a72\u8b39\u614e\u9078\u64c7\u9700\u8981\u7d22\u5f15\u7684\u5217\uff0c\u4e26\u5b9a\u671f\u6aa2\u67e5\u4e0d\u518d\u4f7f\u7528\u7684\u7d22\u5f15\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-YsKSptoLAT\">\u7e3d\u7d50<\/h2>\n<p>\u7d22\u5f15\u7684\u5275\u5efa\u548c\u7ba1\u7406\u662f\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u78ba\u5b9a\u7d22\u5f15\u7684\u5fc5\u8981\u6027\u3001\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u3001\u8003\u616e\u5217\u7684\u9806\u5e8f\u3001\u5b9a\u671f\u7dad\u8b77\u7d22\u5f15\u3001\u6e2c\u8a66\u548c\u76e3\u63a7\u6027\u80fd\uff0c\u4ee5\u53ca\u907f\u514d\u904e\u5ea6\u7d22\u5f15\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u5347\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6548\u7387\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u9999\u6e2f\u7684\u74b0\u5883\u4e2d\u4f7f\u7528 <a href=\"https:\/\/server.hk\">VPS<\/a> \u4f86\u512a\u5316\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u4eab\u5e7e\u500b\u7d22\u5f15\u5275\u5efa\u7684\u5c0f\u6280\u5de7\uff0c\u5e6b\u52a9\u63d0\u5347\u8cc7\u6599\u5eab\u6548\u80fd\uff0c\u512a\u5316\u67e5\u8a62\u901f\u5ea6\uff0c\u8b93\u4f60\u7684\u6578\u64da\u7ba1\u7406\u66f4\u9ad8\u6548\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-157048","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157048","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=157048"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157048\/revisions"}],"predecessor-version":[{"id":157049,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157048\/revisions\/157049"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=157048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=157048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=157048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}