{"id":164109,"date":"2024-11-05T05:06:19","date_gmt":"2024-11-04T21:06:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164109\/"},"modified":"2024-11-05T05:06:20","modified_gmt":"2024-11-04T21:06:20","slug":"%e8%a7%a3%e6%9e%90%e7%b4%a2%e5%bc%95%e4%b8%ad%e6%95%b8%e6%93%9a%e5%88%97%e9%a0%86%e5%ba%8f%e7%9a%84%e9%81%b8%e6%93%87%e5%95%8f%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164109\/","title":{"rendered":"\u89e3\u6790\u7d22\u5f15\u4e2d\u6578\u64da\u5217\u9806\u5e8f\u7684\u9078\u64c7\u554f\u984c"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%9e%90%e7%b4%a2%e5%bc%95%e4%b8%ad%e6%95%b8%e6%93%9a%e5%88%97%e9%a0%86%e5%ba%8f%e7%9a%84%e9%81%b8%e6%93%87%e5%95%8f%e9%a1%8c-MRMplVlhQQ\">\u89e3\u6790\u7d22\u5f15\u4e2d\u6578\u64da\u5217\u9806\u5e8f\u7684\u9078\u64c7\u554f\u984c<\/h1>\n<p>\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\u6027\u80fd\u3002\u7d22\u5f15\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u6548\u7387\u81f3\u95dc\u91cd\u8981\uff0c\u5176\u4e2d\u4e00\u500b\u95dc\u9375\u56e0\u7d20\u5c31\u662f\u7d22\u5f15\u4e2d\u6578\u64da\u5217\u7684\u9806\u5e8f\u9078\u64c7\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e00\u554f\u984c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u5efa\u8b70\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-MRMplVlhQQ\">\u7d22\u5f15\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u80fd\u5920\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u7684\u904e\u7a0b\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u3002\u7d22\u5f15\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u5217\u5275\u5efa\uff0c\u9019\u4e9b\u5217\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%88%97%e9%a0%86%e5%ba%8f%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-MRMplVlhQQ\">\u6578\u64da\u5217\u9806\u5e8f\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u5728\u5275\u5efa\u8907\u5408\u7d22\u5f15\u6642\uff0c\u6578\u64da\u5217\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u6548\u7387\u3002\u7576\u67e5\u8a62\u689d\u4ef6\u4e2d\u5305\u542b\u591a\u500b\u5217\u6642\uff0c\u7d22\u5f15\u7684\u5217\u9806\u5e8f\u61c9\u8a72\u8207\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u9806\u5e8f\u76f8\u5339\u914d\u3002\u9019\u6a23\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528\u7d22\u5f15\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e7%9a%84%e5%bd%b1%e9%9f%bf-MRMplVlhQQ\">\u67e5\u8a62\u6027\u80fd\u7684\u5f71\u97ff<\/h3>\n<p>\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE customer_id = ? AND order_date = ?;<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u5275\u5efa\u4e00\u500b\u7d22\u5f15\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer_order ON orders (customer_id, order_date);<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u7d22\u5f15\u80fd\u5920\u6709\u6548\u652f\u6301\u4e0a\u8ff0\u67e5\u8a62\uff0c\u56e0\u70ba\u67e5\u8a62\u689d\u4ef6\u4e2d\u7684\u5217\u9806\u5e8f\u8207\u7d22\u5f15\u7684\u5217\u9806\u5e8f\u4e00\u81f4\u3002<\/p>\n<h3 id=\"%e9%81%b8%e6%93%87%e5%88%97%e9%a0%86%e5%ba%8f%e7%9a%84%e7%ad%96%e7%95%a5-MRMplVlhQQ\">\u9078\u64c7\u5217\u9806\u5e8f\u7684\u7b56\u7565<\/h3>\n<p>\u5728\u9078\u64c7\u7d22\u5f15\u4e2d\u6578\u64da\u5217\u7684\u9806\u5e8f\u6642\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><strong>\u9078\u64c7\u9ad8\u9078\u64c7\u6027\u5217\uff1a<\/strong>\u9ad8\u9078\u64c7\u6027\u5217\u662f\u6307\u80fd\u5920\u6709\u6548\u5340\u5206\u4e0d\u540c\u8a18\u9304\u7684\u5217\u3002\u5c07\u9ad8\u9078\u64c7\u6027\u5217\u653e\u5728\u7d22\u5f15\u7684\u524d\u9762\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002<\/li>\n<li><strong>\u8003\u616e\u67e5\u8a62\u6a21\u5f0f\uff1a<\/strong>\u5206\u6790\u61c9\u7528\u7a0b\u5e8f\u7684\u67e5\u8a62\u6a21\u5f0f\uff0c\u5c07\u6700\u5e38\u7528\u7684\u67e5\u8a62\u689d\u4ef6\u7684\u5217\u653e\u5728\u7d22\u5f15\u7684\u524d\u9762\u3002<\/li>\n<li><strong>\u907f\u514d\u904e\u591a\u7684\u5217\uff1a<\/strong>\u96d6\u7136\u53ef\u4ee5\u5728\u7d22\u5f15\u4e2d\u5305\u542b\u591a\u500b\u5217\uff0c\u4f46\u904e\u591a\u7684\u5217\u6703\u589e\u52a0\u7d22\u5f15\u7684\u5927\u5c0f\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u5217\u6578\u91cf\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90-MRMplVlhQQ\">\u5be6\u969b\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u5047\u8a2d\u6709\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\uff0c\u7d93\u5e38\u9700\u8981\u67e5\u8a62\u8a02\u55ae\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE customer_id = ?;<\/code><\/pre>\n<pre><code>SELECT * FROM orders WHERE order_date = ?;<\/code><\/pre>\n<pre><code>SELECT * FROM orders WHERE customer_id = ? AND order_date = ?;<\/code><\/pre>\n<p>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5efa\u8b70\u5275\u5efa\u4ee5\u4e0b\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer ON orders (customer_id);<\/code><\/pre>\n<pre><code>CREATE INDEX idx_date ON orders (order_date);<\/code><\/pre>\n<pre><code>CREATE INDEX idx_customer_date ON orders (customer_id, order_date);<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u91dd\u5c0d\u4e0d\u540c\u7684\u67e5\u8a62\u9700\u6c42\uff0c\u63d0\u4f9b\u6700\u4f73\u7684\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-MRMplVlhQQ\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u7d22\u5f15\u4e2d\u6578\u64da\u5217\u7684\u9806\u5e8f\u9078\u64c7\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u901a\u904e\u5408\u7406\u7684\u5217\u9806\u5e8f\u9078\u64c7\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4e86\u89e3\u67e5\u8a62\u6a21\u5f0f\u3001\u9078\u64c7\u9ad8\u9078\u64c7\u6027\u5217\u4ee5\u53ca\u907f\u514d\u904e\u591a\u7684\u5217\u662f\u8a2d\u8a08\u9ad8\u6548\u7d22\u5f15\u7684\u95dc\u9375\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u6aa2\u7d22\u7684\u61c9\u7528\uff0c\u6b63\u78ba\u7684\u7d22\u5f15\u8a2d\u8a08\u5c07\u5e36\u4f86\u986f\u8457\u7684\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u8a0e\u5728\u6578\u64da\u7d22\u5f15\u4e2d\u9078\u64c7\u5217\u9806\u5e8f\u7684\u6700\u4f73\u7b56\u7565\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6578\u64da\u7ba1\u7406\u7684\u6700\u4f73\u5be6\u8e10\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-164109","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164109","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=164109"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164109\/revisions"}],"predecessor-version":[{"id":164110,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164109\/revisions\/164110"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}