{"id":185952,"date":"2024-11-11T01:52:21","date_gmt":"2024-11-10T17:52:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185952\/"},"modified":"2024-11-11T01:52:22","modified_gmt":"2024-11-10T17:52:22","slug":"%e6%95%b8%e6%93%9a%e5%ba%abdate%e6%af%94%e8%bc%83%e5%a4%a7%e5%b0%8f%e8%a9%b3%e8%a7%a3%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%abdate%e6%af%94%e8%bc%83%e5%a4%a7%e5%b0%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185952\/","title":{"rendered":"\u6578\u64da\u5eabdate\u6bd4\u8f03\u5927\u5c0f\u8a73\u89e3\uff08\u6578\u64da\u5eabdate\u6bd4\u8f03\u5927\u5c0f\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%abdate%e6%af%94%e8%bc%83%e5%a4%a7%e5%b0%8f%e8%a9%b3%e8%a7%a3-eZtBEwvCeH\">\u6578\u64da\u5eabdate\u6bd4\u8f03\u5927\u5c0f\u8a73\u89e3<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u65e5\u671f\u7684\u6bd4\u8f03\u662f\u4e00\u500b\u5e38\u898b\u4e14\u91cd\u8981\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u5728\u67e5\u8a62\u6578\u64da\u3001\u7be9\u9078\u8a18\u9304\uff0c\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u6b63\u78ba\u5730\u6bd4\u8f03\u65e5\u671f\u5927\u5c0f\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u4e2d\u65e5\u671f\u6bd4\u8f03\u7684\u539f\u7406\u3001\u65b9\u6cd5\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e6%97%a5%e6%9c%9f%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-eZtBEwvCeH\">\u65e5\u671f\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>\u5728\u5927\u591a\u6578\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4e2d\uff0c\u65e5\u671f\u901a\u5e38\u4ee5\u7279\u5b9a\u7684\u6578\u64da\u985e\u578b\u5b58\u5132\u3002\u5e38\u898b\u7684\u65e5\u671f\u6578\u64da\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>DATE<\/strong>\uff1a\u53ea\u5305\u542b\u65e5\u671f\uff08\u5e74\u3001\u6708\u3001\u65e5\uff09\uff0c\u4e0d\u5305\u542b\u6642\u9593\u3002<\/li>\n<li><strong>DATETIME<\/strong>\uff1a\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u78ba\u5230\u79d2\u3002<\/li>\n<li><strong>TIMESTAMP<\/strong>\uff1a\u985e\u4f3c\u65bcDATETIME\uff0c\u4f46\u901a\u5e38\u7528\u65bc\u8a18\u9304\u4e8b\u4ef6\u7684\u6642\u9593\u6233\u3002<\/li>\n<li><strong>TIME<\/strong>\uff1a\u53ea\u5305\u542b\u6642\u9593\uff08\u6642\u3001\u5206\u3001\u79d2\uff09\uff0c\u4e0d\u5305\u542b\u65e5\u671f\u3002<\/li>\n<\/ul>\n<p>\u4e86\u89e3\u9019\u4e9b\u6578\u64da\u985e\u578b\u6709\u52a9\u65bc\u6211\u5011\u5728\u9032\u884c\u65e5\u671f\u6bd4\u8f03\u6642\u9078\u64c7\u5408\u9069\u7684\u985e\u578b\u3002<\/p>\n<h2 id=\"%e6%97%a5%e6%9c%9f%e6%af%94%e8%bc%83%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86-eZtBEwvCeH\">\u65e5\u671f\u6bd4\u8f03\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u65e5\u671f\u7684\u6bd4\u8f03\u901a\u5e38\u662f\u57fa\u65bc\u5176\u5167\u90e8\u8868\u793a\u9032\u884c\u7684\u3002\u5927\u591a\u6578\u6578\u64da\u5eab\u7cfb\u7d71\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u4e00\u500b\u6574\u6578\u503c\uff0c\u9019\u500b\u6574\u6578\u503c\u4ee3\u8868\u81ea\u67d0\u500b\u57fa\u6e96\u65e5\u671f\u4ee5\u4f86\u7684\u5929\u6578\u6216\u79d2\u6578\u3002\u9019\u4f7f\u5f97\u65e5\u671f\u7684\u6bd4\u8f03\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684\u6578\u503c\u6bd4\u8f03\u4f86\u5be6\u73fe\u3002<\/p>\n<h3 id=\"%e6%af%94%e8%bc%83%e6%93%8d%e4%bd%9c%e7%ac%a6-eZtBEwvCeH\">\u6bd4\u8f03\u64cd\u4f5c\u7b26<\/h3>\n<p>\u5728SQL\u4e2d\uff0c\u5e38\u7528\u7684\u6bd4\u8f03\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>=<\/strong>\uff1a\u7b49\u65bc<\/li>\n<li><strong>!=<\/strong> \u6216 <strong><\/strong>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><strong>&gt;<\/strong>\uff1a\u5927\u65bc<\/li>\n<li><strong>&lt;<\/strong>\uff1a\u5c0f\u65bc<\/li>\n<li><strong>&gt;=<\/strong>\uff1a\u5927\u65bc\u7b49\u65bc<\/li>\n<li><strong>&lt;=<\/strong>\uff1a\u5c0f\u65bc\u7b49\u65bc<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u64cd\u4f5c\u7b26\u53ef\u4ee5\u7528\u65bcWHERE\u5b50\u53e5\u4e2d\uff0c\u4ee5\u7be9\u9078\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%97%a5%e6%9c%9f%e6%af%94%e8%bc%83%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-eZtBEwvCeH\">\u65e5\u671f\u6bd4\u8f03\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u65e5\u671f\u6bd4\u8f03\u5834\u666f\uff1a<\/p>\n<h3 id=\"1-%e6%9f%a5%e8%a9%a2%e7%89%b9%e5%ae%9a%e6%97%a5%e6%9c%9f%e7%af%84%e5%9c%8d%e7%9a%84%e8%a8%98%e9%8c%84-eZtBEwvCeH\">1. \u67e5\u8a62\u7279\u5b9a\u65e5\u671f\u7bc4\u570d\u7684\u8a18\u9304<\/h3>\n<pre><code>SELECT * FROM orders WHERE order_date &gt; '2023-01-01' AND order_date &lt; '2023-12-31';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de2023\u5e74\u5167\u6240\u6709\u8a02\u55ae\u7684\u8a18\u9304\u3002<\/p>\n<h3 id=\"2-%e6%89%be%e5%87%ba%e9%81%8e%e6%9c%9f%e7%9a%84%e8%a8%98%e9%8c%84-eZtBEwvCeH\">2. \u627e\u51fa\u904e\u671f\u7684\u8a18\u9304<\/h3>\n<pre><code>SELECT * FROM subscriptions WHERE end_date &lt; NOW();<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5df2\u904e\u671f\u7684\u8a02\u95b1\u8a18\u9304\u3002<\/p>\n<h3 id=\"3-%e8%a8%88%e7%ae%97%e6%97%a5%e6%9c%9f%e5%b7%ae%e7%95%b0-eZtBEwvCeH\">3. \u8a08\u7b97\u65e5\u671f\u5dee\u7570<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002\u53ef\u4ee5\u4f7f\u7528DATEDIFF\u51fd\u6578\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SELECT DATEDIFF(NOW(), start_date) AS days_difference FROM events;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u65e5\u671f\u8207\u4e8b\u4ef6\u958b\u59cb\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\u7570\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-eZtBEwvCeH\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u65e5\u671f\u6bd4\u8f03\u6642\uff0c\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u65e5\u671f\u683c\u5f0f\u6b63\u78ba\uff0c\u907f\u514d\u56e0\u683c\u5f0f\u4e0d\u4e00\u81f4\u5c0e\u81f4\u7684\u6bd4\u8f03\u932f\u8aa4\u3002<\/li>\n<li>\u8003\u616e\u6642\u5340\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u5230DATETIME\u548cTIMESTAMP\u985e\u578b\u6642\u3002<\/li>\n<li>\u4f7f\u7528\u5408\u9069\u7684\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u6578\u64da\u96c6\u4e0a\u9032\u884c\u65e5\u671f\u7be9\u9078\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-eZtBEwvCeH\">\u7e3d\u7d50<\/h2>\n<p>\u65e5\u671f\u6bd4\u8f03\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\uff0c\u6b63\u78ba\u7684\u6bd4\u8f03\u65b9\u6cd5\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9ad8\u6548\u5730\u7be9\u9078\u548c\u5206\u6790\u6578\u64da\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u7279\u5b9a\u7bc4\u570d\u7684\u8a18\u9304\uff0c\u9084\u662f\u8a08\u7b97\u65e5\u671f\u5dee\u7570\uff0c\u638c\u63e1\u65e5\u671f\u6bd4\u8f03\u7684\u6280\u5de7\u90fd\u662f\u6578\u64da\u5eab\u7ba1\u7406\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u4e2d\u65e5\u671f\u6bd4\u8f03\u5927\u5c0f\u7684\u65b9\u6cd5\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u8655\u7406\u548c\u5206\u6790\u65e5\u671f\u6578\u64da\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-185952","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185952","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=185952"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185952\/revisions"}],"predecessor-version":[{"id":185953,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185952\/revisions\/185953"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}