{"id":80056,"date":"2024-10-16T13:50:14","date_gmt":"2024-10-16T05:50:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80056\/"},"modified":"2024-10-16T13:50:14","modified_gmt":"2024-10-16T05:50:14","slug":"mysql%e6%8c%87%e4%bb%a4-to_days%ef%bc%88%e8%bd%89%e6%8f%9b%e7%82%ba%e5%a4%a9%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80056\/","title":{"rendered":"MySQL\u6307\u4ee4: TO_DAYS()\uff08\u8f49\u63db\u70ba\u5929\u6578\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-to_days%ef%bc%88%e8%bd%89%e6%8f%9b%e7%82%ba%e5%a4%a9%e6%95%b8%ef%bc%89-oTbVBAjHwb\">MySQL\u6307\u4ee4: TO_DAYS()\uff08\u8f49\u63db\u70ba\u5929\u6578\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u5206\u6790\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684TO_DAYS()\u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u7528\u65bc\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5929\u6578\u7684\u6709\u7528\u5de5\u5177\u3002<\/p>\n<h2 id=\"to_days%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-oTbVBAjHwb\">TO_DAYS()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>TO_DAYS()\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u6307\u5b9a\u7684\u65e5\u671f\u8f49\u63db\u70ba\u81ea\u516c\u51430\u5e741\u67081\u65e5\u4ee5\u4f86\u7684\u5929\u6578\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9032\u884c\u65e5\u671f\u8a08\u7b97\u6216\u6bd4\u8f03\u7684\u60c5\u6cc1\u7279\u5225\u6709\u7528\u3002\u8a72\u51fd\u6578\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TO_DAYS(date)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>date<\/code>\u662f\u8981\u8f49\u63db\u7684\u65e5\u671f\uff0c\u53ef\u4ee5\u662f\u65e5\u671f\u5b57\u4e32\u6216\u65e5\u671f\u578b\u5225\u7684\u6b04\u4f4d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-oTbVBAjHwb\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528TO_DAYS()\u51fd\u6578\u7684\u7bc4\u4f8b\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1-%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-oTbVBAjHwb\">\u7bc4\u4f8b1: \u57fa\u672c\u7528\u6cd5<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u65e5\u671f&#8217;2023-10-01&#8217;\uff0c\u6211\u5011\u60f3\u77e5\u9053\u9019\u500b\u65e5\u671f\u8ddd\u96e2\u516c\u51430\u5e74\u6709\u591a\u5c11\u5929\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT TO_DAYS('2023-10-01') AS days;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u81ea\u516c\u51430\u5e74\u4ee5\u4f86\u7684\u5929\u6578\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2-%e8%88%87%e5%85%b6%e4%bb%96%e6%97%a5%e6%9c%9f%e7%9a%84%e6%af%94%e8%bc%83-oTbVBAjHwb\">\u7bc4\u4f8b2: \u8207\u5176\u4ed6\u65e5\u671f\u7684\u6bd4\u8f03<\/h3>\n<p>TO_DAYS()\u51fd\u6578\u4e5f\u53ef\u4ee5\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8a08\u7b97&#8217;2023-10-01&#8217;\u548c&#8217;2023-01-01&#8217;\u4e4b\u9593\u7684\u5929\u6578\u5dee\uff1a<\/p>\n<pre><code>SELECT TO_DAYS('2023-10-01') - TO_DAYS('2023-01-01') AS days_difference;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\uff0c\u5e6b\u52a9\u6211\u5011\u9032\u884c\u65e5\u671f\u7684\u6bd4\u8f03\u548c\u5206\u6790\u3002<\/p>\n<h2 id=\"%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-oTbVBAjHwb\">\u61c9\u7528\u5834\u666f<\/h2>\n<p>TO_DAYS()\u51fd\u6578\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\uff1a<\/p>\n<ul>\n<li><strong>\u5831\u544a\u751f\u6210\uff1a<\/strong>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u53ef\u80fd\u9700\u8981\u8a08\u7b97\u67d0\u6bb5\u6642\u9593\u5167\u7684\u5929\u6578\uff0c\u4ee5\u4fbf\u9032\u884c\u7d71\u8a08\u5206\u6790\u3002<\/li>\n<li><strong>\u6578\u64da\u6e05\u7406\uff1a<\/strong>\u5728\u6578\u64da\u6e05\u7406\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u6aa2\u67e5\u65e5\u671f\u7684\u6709\u6548\u6027\uff0cTO_DAYS()\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u4e0d\u5408\u7406\u7684\u65e5\u671f\u3002<\/li>\n<li><strong>\u6642\u9593\u5e8f\u5217\u5206\u6790\uff1a<\/strong>\u5728\u9032\u884c\u6642\u9593\u5e8f\u5217\u5206\u6790\u6642\uff0c\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5929\u6578\u53ef\u4ee5\u7c21\u5316\u8a08\u7b97\u904e\u7a0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-oTbVBAjHwb\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528TO_DAYS()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u8f38\u5165\u7684\u65e5\u671f\u683c\u5f0f\u5fc5\u9808\u6b63\u78ba\uff0c\u5426\u5247\u51fd\u6578\u5c07\u8fd4\u56deNULL\u3002<\/li>\n<li>TO_DAYS()\u50c5\u652f\u6301\u65e5\u671f\u578b\u5225\uff0c\u5c0d\u65bc\u6642\u9593\u6233\u6216\u5176\u4ed6\u683c\u5f0f\u7684\u65e5\u671f\uff0c\u9700\u5148\u9032\u884c\u8f49\u63db\u3002<\/li>\n<li>\u8a72\u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u6574\u6578\uff0c\u8868\u793a\u81ea\u516c\u51430\u5e74\u4ee5\u4f86\u7684\u5929\u6578\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-oTbVBAjHwb\">\u7e3d\u7d50<\/h2>\n<p>TO_DAYS()\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5728MySQL\u4e2d\u9032\u884c\u65e5\u671f\u7684\u8f49\u63db\u548c\u8a08\u7b97\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\u9084\u662f\u6578\u64da\u6e05\u7406\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u65e5\u671f\u6578\u64da\u7684\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u4f86\u8aaa\uff0c\u638c\u63e1TO_DAYS()\u7684\u4f7f\u7528\u5c07\u5927\u5927\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u7ba1\u7406\u9700\u6c42\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4TO_DAYS()\uff0c\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u81ea\u516c\u5143\u5143\u5e74\u4ee5\u4f86\u7684\u5929\u6578\uff0c\u7c21\u5316\u65e5\u671f\u8a08\u7b97\u8207\u6bd4\u8f03\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-80056","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80056","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=80056"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80056\/revisions"}],"predecessor-version":[{"id":80057,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80056\/revisions\/80057"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}