{"id":79914,"date":"2024-10-16T13:41:15","date_gmt":"2024-10-16T05:41:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79914\/"},"modified":"2024-10-16T13:41:15","modified_gmt":"2024-10-16T05:41:15","slug":"mysql%e6%8c%87%e4%bb%a4-subdate%ef%bc%88%e6%97%a5%e6%9c%9f%e6%b8%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79914\/","title":{"rendered":"MySQL\u6307\u4ee4: SUBDATE()\uff08\u65e5\u671f\u6e1b\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-subdate%ef%bc%88%e6%97%a5%e6%9c%9f%e6%b8%9b%ef%bc%89-WHmbwKPjAJ\">MySQL\u6307\u4ee4: SUBDATE()\uff08\u65e5\u671f\u6e1b\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f <code>SUBDATE()<\/code> \u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5f9e\u6307\u5b9a\u7684\u65e5\u671f\u4e2d\u6e1b\u53bb\u4e00\u6bb5\u6642\u9593\uff0c\u9019\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u8a08\u7b97\u904e\u53bb\u7684\u65e5\u671f\u3001\u751f\u6210\u5831\u544a\u7b49\u3002<\/p>\n<h2 id=\"subdate-%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-WHmbwKPjAJ\">SUBDATE() \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>SUBDATE()<\/code> \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SUBDATE(date, INTERVAL expr unit)<\/code><\/pre>\n<ul>\n<li><code>date<\/code>: \u8981\u9032\u884c\u6e1b\u6cd5\u64cd\u4f5c\u7684\u65e5\u671f\u3002<\/li>\n<li><code>expr<\/code>: \u8981\u6e1b\u53bb\u7684\u6578\u91cf\uff0c\u53ef\u4ee5\u662f\u6b63\u6574\u6578\u6216\u8ca0\u6574\u6578\u3002<\/li>\n<li><code>unit<\/code>: \u6e1b\u53bb\u7684\u6642\u9593\u55ae\u4f4d\uff0c\u53ef\u4ee5\u662f <code>DAY<\/code>\u3001<code>MONTH<\/code>\u3001<code>YEAR<\/code> \u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-WHmbwKPjAJ\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>SUBDATE()<\/code> \u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-1-%e6%b8%9b%e5%8e%bb%e5%a4%a9%e6%95%b8-WHmbwKPjAJ\">\u7bc4\u4f8b 1: \u6e1b\u53bb\u5929\u6578<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u65e5\u671f &#8216;2023-10-10&#8217;\uff0c\u6211\u5011\u60f3\u8981\u6e1b\u53bb 10 \u5929\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT SUBDATE('2023-10-10', INTERVAL 10 DAY) AS Result;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0c\u7d50\u679c\u5c07\u6703\u662f &#8216;2023-09-30&#8217;\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-2-%e6%b8%9b%e5%8e%bb%e6%9c%88%e4%bb%bd-WHmbwKPjAJ\">\u7bc4\u4f8b 2: \u6e1b\u53bb\u6708\u4efd<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u5f9e\u540c\u4e00\u500b\u65e5\u671f\u4e2d\u6e1b\u53bb 2 \u500b\u6708\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT SUBDATE('2023-10-10', INTERVAL 2 MONTH) AS Result;<\/code><\/pre>\n<p>\u7d50\u679c\u5c07\u6703\u662f &#8216;2023-08-10&#8217;\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-3-%e6%b8%9b%e5%8e%bb%e5%b9%b4%e4%bb%bd-WHmbwKPjAJ\">\u7bc4\u4f8b 3: \u6e1b\u53bb\u5e74\u4efd<\/h3>\n<p>\u540c\u6a23\u5730\uff0c\u82e5\u8981\u6e1b\u53bb 1 \u5e74\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SELECT SUBDATE('2023-10-10', INTERVAL 1 YEAR) AS Result;<\/code><\/pre>\n<p>\u7d50\u679c\u5c07\u6703\u662f &#8216;2022-10-10&#8217;\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-WHmbwKPjAJ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>SUBDATE()<\/code> \u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5982\u679c <code>date<\/code> \u7684\u683c\u5f0f\u4e0d\u6b63\u78ba\uff0cMySQL \u6703\u8fd4\u56de NULL\u3002<\/li>\n<li>\u6e1b\u53bb\u7684\u6642\u9593\u55ae\u4f4d\u5fc5\u9808\u662f\u6709\u6548\u7684\u6642\u9593\u55ae\u4f4d\uff0c\u5982 <code>DAY<\/code>\u3001<code>MONTH<\/code>\u3001<code>YEAR<\/code> \u7b49\u3002<\/li>\n<li>\u5982\u679c <code>expr<\/code> \u662f\u8ca0\u6578\uff0c\u5247 <code>SUBDATE()<\/code> \u5c07\u6703\u76f8\u7576\u65bc <code>ADDDATE()<\/code> \u51fd\u6578\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-WHmbwKPjAJ\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u7684 <code>SUBDATE()<\/code> \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u5728\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u6642\u9032\u884c\u9748\u6d3b\u7684\u8a08\u7b97\u3002\u7121\u8ad6\u662f\u7528\u65bc\u751f\u6210\u5831\u544a\u3001\u67e5\u8a62\u6b77\u53f2\u6578\u64da\uff0c\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u5f88\u5927\u7684\u4fbf\u5229\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4SUBDATE()\uff0c\u8f15\u9b06\u9032\u884c\u65e5\u671f\u6e1b\u6cd5\u64cd\u4f5c\uff0c\u8a08\u7b97\u65e5\u671f\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-79914","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79914","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=79914"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79914\/revisions"}],"predecessor-version":[{"id":79915,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79914\/revisions\/79915"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79914"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79914"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}