{"id":185298,"date":"2024-11-10T20:23:16","date_gmt":"2024-11-10T12:23:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185298\/"},"modified":"2024-11-10T20:23:17","modified_gmt":"2024-11-10T12:23:17","slug":"%e4%bd%bf%e7%94%a8sql%e8%aa%9e%e5%8f%a5%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%e6%ae%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185298\/","title":{"rendered":"\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u6642\u9593\u6bb5"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8sql%e8%aa%9e%e5%8f%a5%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%e6%ae%b5-lrMREmeqGk\">\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u6642\u9593\u6bb5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u6bb5\u7684\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5206\u6790\u92b7\u552e\u6578\u64da\u3001\u7528\u6236\u6d3b\u52d5\u9084\u662f\u7cfb\u7d71\u65e5\u8a8c\uff0c\u80fd\u5920\u6709\u6548\u5730\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u67e5\u8a62\u6642\u9593\u6bb5\u5167\u7684\u6578\u64da\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u6642\u9593\u6bb5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e6%99%82%e9%96%93%e6%a0%bc%e5%bc%8f%e7%9a%84%e7%90%86%e8%a7%a3-lrMREmeqGk\">\u6642\u9593\u683c\u5f0f\u7684\u7406\u89e3<\/h2>\n<p>\u5728\u9032\u884c\u6642\u9593\u67e5\u8a62\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u4e86\u89e3\u6578\u64da\u5eab\u4e2d\u6642\u9593\u7684\u5b58\u5132\u683c\u5f0f\u3002\u5927\u591a\u6578\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982MySQL\u3001PostgreSQL\u3001SQL Server\u7b49\uff09\u90fd\u652f\u6301\u591a\u7a2e\u6642\u9593\u683c\u5f0f\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>DATE<\/strong>\uff1a\u53ea\u5305\u542b\u65e5\u671f\uff08YYYY-MM-DD\uff09\u3002<\/li>\n<li><strong>TIME<\/strong>\uff1a\u53ea\u5305\u542b\u6642\u9593\uff08HH:MM:SS\uff09\u3002<\/li>\n<li><strong>DATETIME<\/strong>\uff1a\u540c\u6642\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\uff08YYYY-MM-DD HH:MM:SS\uff09\u3002<\/li>\n<li><strong>TIMESTAMP<\/strong>\uff1a\u985e\u4f3c\u65bcDATETIME\uff0c\u4f46\u901a\u5e38\u6703\u6839\u64da\u6642\u5340\u9032\u884c\u8abf\u6574\u3002<\/li>\n<\/ul>\n<p>\u5728\u67e5\u8a62\u6642\uff0c\u78ba\u4fdd\u4f7f\u7528\u6b63\u78ba\u7684\u683c\u5f0f\u4f86\u907f\u514d\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84%e6%99%82%e9%96%93%e6%ae%b5%e6%9f%a5%e8%a9%a2-lrMREmeqGk\">\u57fa\u672c\u7684\u6642\u9593\u6bb5\u67e5\u8a62<\/h2>\n<p>\u8981\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u6bb5\u5167\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u7684 <code>WHERE<\/code> \u5b50\u53e5\u7d50\u5408\u6642\u9593\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u67e5\u8a62\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nWHERE order_date BETWEEN '2023-01-01' AND '2023-01-31';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u67e5\u8a62\u4e86\u57282023\u5e741\u67081\u65e5\u81f32023\u5e741\u670831\u65e5\u4e4b\u9593\u7684\u6240\u6709\u8a02\u55ae\u3002<code>BETWEEN<\/code> \u95dc\u9375\u5b57\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u7684\u958b\u59cb\u548c\u7d50\u675f\u6642\u9593\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-lrMREmeqGk\">\u4f7f\u7528\u65e5\u671f\u51fd\u6578\u9032\u884c\u67e5\u8a62<\/h2>\n<p>\u8a31\u591a\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u65e5\u671f\u51fd\u6578\uff0c\u53ef\u4ee5\u7528\u4f86\u9032\u884c\u66f4\u9748\u6d3b\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>CURDATE()<\/code> \u51fd\u6578\u4f86\u7372\u53d6\u7576\u524d\u65e5\u671f\uff0c\u4e26\u67e5\u8a62\u904e\u53bb\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM users\nWHERE registration_date &gt; CURDATE() - INTERVAL 30 DAY;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u904e\u53bb30\u5929\u5167\u8a3b\u518a\u7684\u6240\u6709\u7528\u6236\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e7%89%b9%e5%ae%9a%e6%99%82%e9%96%93%e6%ae%b5%e7%9a%84%e8%81%9a%e5%90%88%e6%95%b8%e6%93%9a-lrMREmeqGk\">\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u6bb5\u7684\u805a\u5408\u6578\u64da<\/h2>\n<p>\u9664\u4e86\u67e5\u8a62\u5177\u9ad4\u7684\u6578\u64da\u5916\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528\u805a\u5408\u51fd\u6578\u4f86\u7372\u53d6\u6642\u9593\u6bb5\u5167\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u8a08\u7b97\u67d0\u500b\u6642\u9593\u6bb5\u5167\u7684\u7e3d\u92b7\u552e\u984d\uff1a<\/p>\n<pre><code>SELECT SUM(amount) AS total_sales\nFROM sales\nWHERE sale_date BETWEEN '2023-01-01' AND '2023-01-31';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u5728\u6307\u5b9a\u6642\u9593\u6bb5\u5167\u7684\u7e3d\u92b7\u552e\u984d\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-lrMREmeqGk\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u6642\u9593\u6bb5\u67e5\u8a62\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6642\u9593\u683c\u5f0f\u6b63\u78ba\uff0c\u907f\u514d\u56e0\u683c\u5f0f\u932f\u8aa4\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\u3002<\/li>\n<li>\u8003\u616e\u6642\u5340\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u8655\u7406 <code>TIMESTAMP<\/code> \u985e\u578b\u7684\u6578\u64da\u6642\u3002<\/li>\n<li>\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u5927\u6578\u64da\u96c6\u4e0a\u9032\u884c\u6642\u9593\u67e5\u8a62\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-lrMREmeqGk\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u6642\u9593\u6bb5\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u5206\u6790\u548c\u7ba1\u7406\u6578\u64da\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u7684\u67e5\u8a62\u8a9e\u6cd5\u3001\u65e5\u671f\u51fd\u6578\u548c\u805a\u5408\u51fd\u6578\uff0c\u60a8\u53ef\u4ee5\u9748\u6d3b\u5730\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u7121\u8ad6\u662f\u9078\u64c7 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u90fd\u80fd\u70ba\u60a8\u7684\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u5f37\u6709\u529b\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u6bb5\u7684\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\u6548\u7387\uff0c\u7cbe\u78ba\u7372\u53d6\u6240\u9700\u8cc7\u8a0a\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-185298","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185298","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=185298"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185298\/revisions"}],"predecessor-version":[{"id":185299,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185298\/revisions\/185299"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}