{"id":79258,"date":"2024-10-16T12:51:15","date_gmt":"2024-10-16T04:51:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79258\/"},"modified":"2024-10-16T12:51:15","modified_gmt":"2024-10-16T04:51:15","slug":"mysql%e6%8c%87%e4%bb%a4-month%ef%bc%88%e6%9c%88%e4%bb%bd%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79258\/","title":{"rendered":"MySQL\u6307\u4ee4: MONTH()\uff08\u6708\u4efd\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-month%ef%bc%88%e6%9c%88%e4%bb%bd%ef%bc%89-IeLYtfafpl\">MySQL\u6307\u4ee4: MONTH()\uff08\u6708\u4efd\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\u7684MONTH()\u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u7528\u65bc\u63d0\u53d6\u65e5\u671f\u4e2d\u6708\u4efd\u7684\u7c21\u55ae\u800c\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n<h2 id=\"month%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-IeLYtfafpl\">MONTH()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>MONTH()\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5f9e\u7d66\u5b9a\u7684\u65e5\u671f\u4e2d\u63d0\u53d6\u51fa\u6708\u4efd\u3002\u9019\u500b\u51fd\u6578\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\uff1a<\/p>\n<pre><code>MONTH(date)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>date<\/code>\u662f\u8981\u63d0\u53d6\u6708\u4efd\u7684\u65e5\u671f\u503c\u3002\u8a72\u51fd\u6578\u8fd4\u56de\u4e00\u500b\u6574\u6578\uff0c\u7bc4\u570d\u5f9e1\u523012\uff0c\u5206\u5225\u4ee3\u8868\u4e00\u6708\u5230\u5341\u4e8c\u6708\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-IeLYtfafpl\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528MONTH()\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%ef%bc%9a%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-IeLYtfafpl\">\u7bc4\u4f8b1\uff1a\u57fa\u672c\u7528\u6cd5<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>orders<\/code>\u7684\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u500b<code>order_date<\/code>\u6b04\u4f4d\uff0c\u8a18\u9304\u4e86\u6bcf\u500b\u8a02\u55ae\u7684\u65e5\u671f\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528MONTH()\u51fd\u6578\u4f86\u63d0\u53d6\u6240\u6709\u8a02\u55ae\u7684\u6708\u4efd\uff1a<\/p>\n<pre><code>SELECT order_date, MONTH(order_date) AS order_month\nFROM orders;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u8a02\u55ae\u7684\u65e5\u671f\u4ee5\u53ca\u76f8\u61c9\u7684\u6708\u4efd\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2%ef%bc%9a%e9%81%8e%e6%bf%be%e7%89%b9%e5%ae%9a%e6%9c%88%e4%bb%bd%e7%9a%84%e6%95%b8%e6%93%9a-IeLYtfafpl\">\u7bc4\u4f8b2\uff1a\u904e\u6ffe\u7279\u5b9a\u6708\u4efd\u7684\u6578\u64da<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u67e5\u8a62\u7279\u5b9a\u6708\u4efd\u7684\u8a02\u55ae\uff0c\u4f8b\u5982\u67e5\u8a62\u6240\u6709\u57282023\u5e743\u6708\u4e0b\u7684\u8a02\u55ae\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT *\nFROM orders\nWHERE MONTH(order_date) = 3 AND YEAR(order_date) = 2023;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u57282023\u5e743\u6708\u7684\u8a02\u55ae\u3002<\/p>\n<h2 id=\"%e7%b5%90%e5%90%88%e5%85%b6%e4%bb%96%e5%87%bd%e6%95%b8%e4%bd%bf%e7%94%a8-IeLYtfafpl\">\u7d50\u5408\u5176\u4ed6\u51fd\u6578\u4f7f\u7528<\/h2>\n<p>MONTH()\u51fd\u6578\u53ef\u4ee5\u8207\u5176\u4ed6\u65e5\u671f\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528YEAR()\u51fd\u6578\u4f86\u540c\u6642\u63d0\u53d6\u5e74\u4efd\u548c\u6708\u4efd\uff1a<\/p>\n<pre><code>SELECT YEAR(order_date) AS order_year, MONTH(order_date) AS order_month, COUNT(*) AS total_orders\nFROM orders\nGROUP BY order_year, order_month;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u5e74\u6bcf\u6708\u7684\u8a02\u55ae\u6578\u91cf\uff0c\u5e6b\u52a9\u60a8\u5206\u6790\u696d\u52d9\u8da8\u52e2\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-IeLYtfafpl\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528MONTH()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u50b3\u5165\u7684\u65e5\u671f\u70baNULL\uff0c\u5247\u8fd4\u56de\u503c\u4e5f\u5c07\u662fNULL\u3002<\/li>\n<li>MONTH()\u51fd\u6578\u50c5\u9069\u7528\u65bc\u65e5\u671f\u985e\u578b\u7684\u6578\u64da\uff0c\u78ba\u4fdd\u60a8\u50b3\u5165\u7684\u53c3\u6578\u662f\u6709\u6548\u7684\u65e5\u671f\u683c\u5f0f\u3002<\/li>\n<li>\u5728\u9032\u884c\u65e5\u671f\u8a08\u7b97\u6642\uff0c\u8003\u616e\u5230\u6642\u5340\u7684\u5f71\u97ff\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u4f86\u81ea\u4e0d\u540c\u5730\u5340\u7684\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-IeLYtfafpl\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684MONTH()\u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u8f15\u9b06\u63d0\u53d6\u548c\u5206\u6790\u65e5\u671f\u4e2d\u7684\u6708\u4efd\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5831\u544a\u3001\u696d\u52d9\u5206\u6790\u9084\u662f\u6578\u64da\u6316\u6398\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u91cd\u8981\u7684\u652f\u6301\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684MONTH()\u51fd\u6570\uff0c\u8f7b\u677e\u63d0\u53d6\u65e5\u671f\u4e2d\u7684\u6708\u4efd\uff0c\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\uff0c\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2\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-79258","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79258","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=79258"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79258\/revisions"}],"predecessor-version":[{"id":79259,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79258\/revisions\/79259"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79258"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79258"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}