{"id":66469,"date":"2024-10-14T17:47:15","date_gmt":"2024-10-14T09:47:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66469\/"},"modified":"2024-10-14T17:47:15","modified_gmt":"2024-10-14T09:47:15","slug":"mysql-datediff%e8%aa%9e%e6%b3%95%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66469\/","title":{"rendered":"MySQL DATEDIFF()\u8a9e\u6cd5\u4ecb\u7d39"},"content":{"rendered":"<h1 id=\"mysql-datediff%e8%aa%9e%e6%b3%95%e4%bb%8b%e7%b4%b9-hHVBMuhJpk\">MySQL DATEDIFF()\u8a9e\u6cd5\u4ecb\u7d39<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u3002\u5176\u4e2d\uff0c<code>DATEDIFF()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/p>\n<h2 id=\"datediff%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-hHVBMuhJpk\">DATEDIFF()\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>DATEDIFF()<\/code>\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DATEDIFF(date1, date2)<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>date1<\/code>\u548c<code>date2<\/code>\u90fd\u662f\u65e5\u671f\u985e\u578b\u7684\u503c\u3002\u8a72\u51fd\u6578\u5c07\u8fd4\u56de<code>date1<\/code>\u548c<code>date2<\/code>\u4e4b\u9593\u7684\u5929\u6578\u5dee\u7570\u3002\u5982\u679c<code>date1<\/code>\u65e9\u65bc<code>date2<\/code>\uff0c\u5247\u8fd4\u56de\u7684\u503c\u70ba\u8ca0\u6578\uff1b\u5982\u679c<code>date1<\/code>\u665a\u65bc<code>date2<\/code>\uff0c\u5247\u8fd4\u56de\u7684\u503c\u70ba\u6b63\u6578\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-hHVBMuhJpk\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>DATEDIFF()<\/code>\u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-1%ef%bc%9a%e8%a8%88%e7%ae%97%e5%85%a9%e5%80%8b%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e5%a4%a9%e6%95%b8-hHVBMuhJpk\">\u7bc4\u4f8b 1\uff1a\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578<\/h3>\n<pre><code>SELECT DATEDIFF('2023-10-01', '2023-09-25') AS days_difference;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u8a62\u5c07\u8fd4\u56de<code>6<\/code>\uff0c\u56e0\u70ba\u5f9e2023\u5e749\u670825\u65e5\u52302023\u5e7410\u67081\u65e5\u67096\u5929\u7684\u5dee\u8ddd\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-2%ef%bc%9a%e8%a8%88%e7%ae%97%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f%e8%88%87%e7%89%b9%e5%ae%9a%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e5%b7%ae%e7%95%b0-hHVBMuhJpk\">\u7bc4\u4f8b 2\uff1a\u8a08\u7b97\u7576\u524d\u65e5\u671f\u8207\u7279\u5b9a\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570<\/h3>\n<pre><code>SELECT DATEDIFF(CURDATE(), '2023-01-01') AS days_since_new_year;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u5f9e2023\u5e741\u67081\u65e5\u5230\u7576\u524d\u65e5\u671f\u7684\u5929\u6578\u5dee\u7570\u3002<code>CURDATE()<\/code>\u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u65e5\u671f\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-hHVBMuhJpk\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><code>DATEDIFF()<\/code>\u51fd\u6578\u50c5\u8a08\u7b97\u65e5\u671f\u90e8\u5206\uff0c\u6642\u9593\u90e8\u5206\u5c07\u88ab\u5ffd\u7565\u3002<\/li>\n<li>\u5982\u679c\u4efb\u4e00\u65e5\u671f\u7121\u6548\uff0c\u5247\u51fd\u6578\u5c07\u8fd4\u56de<code>NULL<\/code>\u3002<\/li>\n<li>\u8a72\u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u6574\u6578\uff0c\u8868\u793a\u5929\u6578\u7684\u5dee\u7570\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-hHVBMuhJpk\">\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>DATEDIFF()<\/code>\u51fd\u6578\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u8a08\u7b97\u8a02\u55ae\u7684\u8655\u7406\u6642\u9593\u3002<\/li>\n<li>\u5206\u6790\u7528\u6236\u7684\u6d3b\u8e8d\u5929\u6578\u3002<\/li>\n<li>\u751f\u6210\u5831\u544a\u4ee5\u986f\u793a\u67d0\u4e00\u4e8b\u4ef6\u7684\u6301\u7e8c\u6642\u9593\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u61c9\u7528\u4e0d\u50c5\u80fd\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u7406\u89e3\u5176\u696d\u52d9\u904b\u4f5c\uff0c\u9084\u80fd\u63d0\u4f9b\u6709\u50f9\u503c\u7684\u6578\u64da\u652f\u6301\u6c7a\u7b56\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-hHVBMuhJpk\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u7684<code>DATEDIFF()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u8f15\u9b06\u8a08\u7b97\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u9084\u662f\u65e5\u5e38\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0c\u638c\u63e1\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u9805\u76ee\u4e2d\u4f7f\u7528<code>DATEDIFF()<\/code>\u51fd\u6578\u6709\u9032\u4e00\u6b65\u7684\u7591\u554f\uff0c\u6216\u8005\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u66f4\u5927\u7684\u9748\u6d3b\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL DATEDIFF()\u8a9e\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\u7570\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-66469","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66469","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=66469"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66469\/revisions"}],"predecessor-version":[{"id":66470,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66469\/revisions\/66470"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}