{"id":196211,"date":"2024-11-13T21:24:30","date_gmt":"2024-11-13T13:24:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196211\/"},"modified":"2024-11-13T21:24:32","modified_gmt":"2024-11-13T13:24:32","slug":"%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bd%bf%e7%94%a8%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%e7%9a%84%e6%8a%80%e5%b7%a7-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bd%bf%e7%94%a8%e6%99%82%e9%96%93%e5%87%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196211\/","title":{"rendered":"\u638c\u63e1\u6578\u64da\u5eab\u4f7f\u7528\u6642\u9593\u51fd\u6578\u7684\u6280\u5de7 (\u6578\u64da\u5eab\u4f7f\u7528\u6642\u9593\u51fd\u6578)"},"content":{"rendered":"<h1 id=\"%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bd%bf%e7%94%a8%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%e7%9a%84%e6%8a%80%e5%b7%a7-KzlhfyRoRz\">\u638c\u63e1\u6578\u64da\u5eab\u4f7f\u7528\u6642\u9593\u51fd\u6578\u7684\u6280\u5de7<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6642\u9593\u51fd\u6578\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u7121\u8ad6\u662f\u9032\u884c\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\uff0c\u9084\u662f\u6578\u64da\u7684\u6642\u9593\u6233\u8a18\u9304\uff0c\u6642\u9593\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u6642\u9593\u51fd\u6578\u53ca\u5176\u61c9\u7528\u6280\u5de7\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u6709\u6548\u5730\u5229\u7528\u9019\u4e9b\u5de5\u5177\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%ef%bc%9f-KzlhfyRoRz\">\u4ec0\u9ebc\u662f\u6642\u9593\u51fd\u6578\uff1f<\/h2>\n<p>\u6642\u9593\u51fd\u6578\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u7528\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u7684\u51fd\u6578\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u7372\u53d6\u7576\u524d\u6642\u9593\u3001\u8a08\u7b97\u6642\u9593\u5dee\u3001\u683c\u5f0f\u5316\u65e5\u671f\u7b49\u3002\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982 MySQL\u3001PostgreSQL\u3001SQL Server \u7b49\uff09\u63d0\u4f9b\u4e86\u5404\u81ea\u7684\u6642\u9593\u51fd\u6578\uff0c\u96d6\u7136\u8a9e\u6cd5\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u4f46\u57fa\u672c\u529f\u80fd\u76f8\u4f3c\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8-KzlhfyRoRz\">\u5e38\u898b\u7684\u6642\u9593\u51fd\u6578<\/h2>\n<h3 id=\"1-%e7%8d%b2%e5%8f%96%e7%95%b6%e5%89%8d%e6%99%82%e9%96%93-KzlhfyRoRz\">1. \u7372\u53d6\u7576\u524d\u6642\u9593<\/h3>\n<p>\u5728\u5927\u591a\u6578\u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6578\u4f86\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff1a<\/p>\n<ul>\n<li><code>NOW()<\/code>\uff1a\u5728 MySQL \u4e2d\u4f7f\u7528\uff0c\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<li><code>GETDATE()<\/code>\uff1a\u5728 SQL Server \u4e2d\u4f7f\u7528\uff0c\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<li><code>CURRENT_TIMESTAMP<\/code>\uff1a\u5728 PostgreSQL \u548c MySQL \u4e2d\u5747\u53ef\u4f7f\u7528\uff0c\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e5%8a%a0%e6%b8%9b-KzlhfyRoRz\">2. \u65e5\u671f\u548c\u6642\u9593\u7684\u52a0\u6e1b<\/h3>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u65e5\u671f\u9032\u884c\u52a0\u6e1b\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><code>DATE_ADD(date, INTERVAL expr unit)<\/code>\uff1a\u5728 MySQL \u4e2d\u4f7f\u7528\uff0c\u5c07\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u52a0\u5230\u65e5\u671f\u4e0a\u3002<\/li>\n<li><code>DATE_SUB(date, INTERVAL expr unit)<\/code>\uff1a\u5728 MySQL \u4e2d\u4f7f\u7528\uff0c\u5f9e\u65e5\u671f\u4e2d\u6e1b\u53bb\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u3002<\/li>\n<li><code>DATEADD(unit, number, date)<\/code>\uff1a\u5728 SQL Server \u4e2d\u4f7f\u7528\uff0c\u5c07\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u52a0\u5230\u65e5\u671f\u4e0a\u3002<\/li>\n<\/ul>\n<h3 id=\"3-%e6%a0%bc%e5%bc%8f%e5%8c%96%e6%97%a5%e6%9c%9f-KzlhfyRoRz\">3. \u683c\u5f0f\u5316\u65e5\u671f<\/h3>\n<p>\u683c\u5f0f\u5316\u65e5\u671f\u662f\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u7279\u5b9a\u683c\u5f0f\u7684\u904e\u7a0b\u3002\u5e38\u7528\u7684\u683c\u5f0f\u5316\u51fd\u6578\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>DATE_FORMAT(date, format)<\/code>\uff1a\u5728 MySQL \u4e2d\u4f7f\u7528\uff0c\u6839\u64da\u6307\u5b9a\u683c\u5f0f\u8fd4\u56de\u65e5\u671f\u3002<\/li>\n<li><code>FORMAT(date, format)<\/code>\uff1a\u5728 SQL Server \u4e2d\u4f7f\u7528\uff0c\u6839\u64da\u6307\u5b9a\u683c\u5f0f\u8fd4\u56de\u65e5\u671f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e6%8a%80%e5%b7%a7-KzlhfyRoRz\">\u6642\u9593\u51fd\u6578\u7684\u61c9\u7528\u6280\u5de7<\/h2>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e7%af%a9%e9%81%b8-KzlhfyRoRz\">1. \u6578\u64da\u7be9\u9078<\/h3>\n<p>\u4f7f\u7528\u6642\u9593\u51fd\u6578\u53ef\u4ee5\u6709\u6548\u5730\u7be9\u9078\u6578\u64da\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u904e\u53bb\u4e00\u5468\u5167\u7684\u6240\u6709\u8a02\u55ae\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE order_date &gt;= NOW() - INTERVAL 7 DAY;<\/code><\/pre>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e5%88%86%e7%b5%84-KzlhfyRoRz\">2. \u6578\u64da\u5206\u7d44<\/h3>\n<p>\u6642\u9593\u51fd\u6578\u4e5f\u53ef\u4ee5\u7528\u65bc\u6578\u64da\u5206\u7d44\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u6309\u6708\u7d71\u8a08\u92b7\u552e\u984d\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SELECT DATE_FORMAT(order_date, '%Y-%m') AS month, SUM(amount) AS total_sales \nFROM orders \nGROUP BY month;<\/code><\/pre>\n<h3 id=\"3-%e8%a8%88%e7%ae%97%e6%99%82%e9%96%93%e5%b7%ae-KzlhfyRoRz\">3. \u8a08\u7b97\u6642\u9593\u5dee<\/h3>\n<p>\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u4e5f\u662f\u6642\u9593\u51fd\u6578\u7684\u4e00\u500b\u91cd\u8981\u61c9\u7528\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u8a08\u7b97\u6bcf\u500b\u8a02\u55ae\u7684\u8655\u7406\u6642\u9593\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SELECT order_id, DATEDIFF(NOW(), order_date) AS processing_time \nFROM orders;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KzlhfyRoRz\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1\u6578\u64da\u5eab\u4e2d\u7684\u6642\u9593\u51fd\u6578\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u5206\u6790\u548c\u7ba1\u7406\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u9032\u884c\u6578\u64da\u7be9\u9078\u3001\u5206\u7d44\u9084\u662f\u8a08\u7b97\u6642\u9593\u5dee\uff0c\u6642\u9593\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u900f\u904e\u4f7f\u7528\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u4f01\u696d\u80fd\u5920\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u5176\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u5347\u696d\u52d9\u904b\u71df\u7684\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1\u6578\u64da\u5eab\u4f7f\u7528\u6642\u9593\u51fd\u6578\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7cbe\u78ba\u7ba1\u7406\u6642\u9593\u6578\u64da\uff0c\u52a9\u529b\u696d\u52d9\u6c7a\u7b56\u8207\u5206\u6790\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-196211","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196211","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=196211"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196211\/revisions"}],"predecessor-version":[{"id":196212,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196211\/revisions\/196212"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}