{"id":80417,"date":"2024-10-16T14:19:13","date_gmt":"2024-10-16T06:19:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80417\/"},"modified":"2024-10-16T14:19:13","modified_gmt":"2024-10-16T06:19:13","slug":"mysql%e4%b8%ad%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8cdate%e9%a1%9e%e5%9e%8b%e6%af%94%e8%bc%83%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%addate%e9%a1%9e%e7%9a%84%e6%af%94%e8%bc%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80417\/","title":{"rendered":"MySQL\u4e2d\u5982\u4f55\u9032\u884cDate\u985e\u578b\u6bd4\u8f03\uff1f (\u6578\u64da\u5eab\u4e2ddate\u985e\u7684\u6bd4\u8f03)"},"content":{"rendered":"<h1 id=\"mysql%e4%b8%ad%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8cdate%e9%a1%9e%e5%9e%8b%e6%af%94%e8%bc%83%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%addate%e9%a1%9e%e7%9a%84%e6%af%94%e8%bc%83-cOMEJxsdOt\">MySQL\u4e2d\u5982\u4f55\u9032\u884cDate\u985e\u578b\u6bd4\u8f03\uff1f (\u6578\u64da\u5eab\u4e2ddate\u985e\u7684\u6bd4\u8f03)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5c24\u5176\u662f\u5728\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u5206\u6790\u6642\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u6bd4\u8f03Date\u985e\u578b\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2dDate\u985e\u578b\u7684\u6bd4\u8f03\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84date%e9%a1%9e%e5%9e%8b-cOMEJxsdOt\">MySQL\u4e2d\u7684Date\u985e\u578b<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cDate\u985e\u578b\u7528\u65bc\u5b58\u5132\u65e5\u671f\uff0c\u683c\u5f0f\u70ba&#8217;YYYY-MM-DD&#8217;\u3002\u9019\u4f7f\u5f97\u65e5\u671f\u7684\u5b58\u5132\u548c\u6bd4\u8f03\u8b8a\u5f97\u7c21\u55ae\u800c\u9ad8\u6548\u3002MySQL\u9084\u652f\u6301\u5176\u4ed6\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff0c\u5982DATETIME\u548cTIMESTAMP\uff0c\u4f46\u5728\u9019\u88e1\u6211\u5011\u5c07\u5c08\u6ce8\u65bcDate\u985e\u578b\u7684\u6bd4\u8f03\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84date%e6%af%94%e8%bc%83-cOMEJxsdOt\">\u57fa\u672c\u7684Date\u6bd4\u8f03<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u9032\u884cDate\u985e\u578b\u7684\u6bd4\u8f03\u975e\u5e38\u7c21\u55ae\u3002\u53ef\u4ee5\u4f7f\u7528\u6a19\u6e96\u7684\u6bd4\u8f03\u904b\u7b97\u7b26\uff0c\u5982=\u3001!=\u3001\u3001=\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684\u6bd4\u8f03\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE order_date = '2023-10-01';\nSELECT * FROM orders WHERE order_date &gt; '2023-10-01';\nSELECT * FROM orders WHERE order_date &lt;= '2023-10-01';<\/code><\/pre>\n<p>\u9019\u4e9b\u67e5\u8a62\u5c07\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u6240\u6709\u8a02\u55ae\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8between%e9%80%b2%e8%a1%8c%e7%af%84%e5%9c%8d%e6%af%94%e8%bc%83-cOMEJxsdOt\">\u4f7f\u7528BETWEEN\u9032\u884c\u7bc4\u570d\u6bd4\u8f03<\/h2>\n<p>\u5982\u679c\u9700\u8981\u67e5\u8a62\u67d0\u500b\u65e5\u671f\u7bc4\u570d\u5167\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528BETWEEN\u904b\u7b97\u7b26\u3002\u9019\u6a23\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u6307\u5b9a\u8d77\u59cb\u548c\u7d50\u675f\u65e5\u671f\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE order_date BETWEEN '2023-10-01' AND '2023-10-31';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de2023\u5e7410\u67081\u65e5\u81f310\u670831\u65e5\u4e4b\u9593\u7684\u6240\u6709\u8a02\u55ae\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8date%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e6%af%94%e8%bc%83-cOMEJxsdOt\">\u4f7f\u7528DATE\u51fd\u6578\u9032\u884c\u6bd4\u8f03<\/h2>\n<p>MySQL\u9084\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5167\u5efa\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\uff0c\u4f8b\u5982DATE()\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u5f9eDATETIME\u6216TIMESTAMP\u985e\u578b\u4e2d\u63d0\u53d6\u51fa\u65e5\u671f\u90e8\u5206\uff0c\u4e26\u9032\u884c\u6bd4\u8f03\uff1a<\/p>\n<pre><code>SELECT * FROM events WHERE DATE(event_time) = '2023-10-01';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u57282023\u5e7410\u67081\u65e5\u767c\u751f\u7684\u4e8b\u4ef6\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86null%e5%80%bc%e7%9a%84%e6%af%94%e8%bc%83-cOMEJxsdOt\">\u8655\u7406NULL\u503c\u7684\u6bd4\u8f03<\/h2>\n<p>\u5728\u9032\u884cDate\u985e\u578b\u7684\u6bd4\u8f03\u6642\uff0c\u9084\u9700\u8981\u8003\u616e\u5230NULL\u503c\u7684\u60c5\u6cc1\u3002NULL\u503c\u5728MySQL\u4e2d\u8868\u793a\u7f3a\u5931\u7684\u6578\u64da\uff0c\u56e0\u6b64\u5728\u6bd4\u8f03\u6642\u9700\u8981\u7279\u5225\u6ce8\u610f\u3002\u53ef\u4ee5\u4f7f\u7528IS NULL\u6216IS NOT NULL\u4f86\u6aa2\u67e5NULL\u503c\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE last_login IS NULL;\nSELECT * FROM users WHERE last_login IS NOT NULL;<\/code><\/pre>\n<p>\u9019\u4e9b\u67e5\u8a62\u5c07\u5206\u5225\u8fd4\u56de\u6700\u5f8c\u767b\u9304\u6642\u9593\u70baNULL\u548c\u4e0d\u70baNULL\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-cOMEJxsdOt\">\u7d50\u8ad6<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cDate\u985e\u578b\u7684\u6bd4\u8f03\u662f\u6578\u64da\u67e5\u8a62\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528\u57fa\u672c\u7684\u6bd4\u8f03\u904b\u7b97\u7b26\u3001BETWEEN\u904b\u7b97\u7b26\u3001DATE\u51fd\u6578\u4ee5\u53ca\u8655\u7406NULL\u503c\u7684\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u67e5\u8a62\u548c\u5206\u6790\u65e5\u671f\u6578\u64da\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u63d0\u9ad8\u4e86\u67e5\u8a62\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u6642\u9593\u7dad\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728MySQL\u4e2d\u9032\u884cDate\u985e\u578b\u6bd4\u8f03\uff0c\u638c\u63e1\u67e5\u8a62\u3001\u7bc4\u570d\u904e\u6ffe\u53ca\u65e5\u671f\u51fd\u6578\u7684\u4f7f\u7528\u6280\u5de7\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-80417","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80417","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=80417"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80417\/revisions"}],"predecessor-version":[{"id":80418,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80417\/revisions\/80418"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}