{"id":75826,"date":"2024-10-16T01:33:17","date_gmt":"2024-10-15T17:33:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75826\/"},"modified":"2024-10-16T01:33:17","modified_gmt":"2024-10-15T17:33:17","slug":"mysql-%e6%9f%a5%e8%a9%a2%e4%b8%ad%e6%97%a5%e6%9c%9f%e6%a0%bc%e5%bc%8f%e8%bd%89%e6%8f%9b%e5%87%bd%e6%95%b8%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75826\/","title":{"rendered":"MySQL \u67e5\u8a62\u4e2d\u65e5\u671f\u683c\u5f0f\u8f49\u63db\u51fd\u6578\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"mysql-%e6%9f%a5%e8%a9%a2%e4%b8%ad%e6%97%a5%e6%9c%9f%e6%a0%bc%e5%bc%8f%e8%bd%89%e6%8f%9b%e5%87%bd%e6%95%b8%e7%b0%a1%e4%bb%8b-cgnBWwxySM\">MySQL \u67e5\u8a62\u4e2d\u65e5\u671f\u683c\u5f0f\u8f49\u63db\u51fd\u6578\u7c21\u4ecb<\/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\u4e00\u74b0\u3002MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\u683c\u5f0f\u7684\u8f49\u63db\uff0c\u9019\u4e9b\u51fd\u6578\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u67e5\u8a62\u4e2d\u66f4\u6709\u6548\u5730\u64cd\u4f5c\u548c\u986f\u793a\u65e5\u671f\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u500b\u5e38\u7528\u7684\u65e5\u671f\u683c\u5f0f\u8f49\u63db\u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-date_format-%e5%87%bd%e6%95%b8-cgnBWwxySM\">1. DATE_FORMAT \u51fd\u6578<\/h2>\n<p>DATE_FORMAT \u51fd\u6578\u7528\u65bc\u683c\u5f0f\u5316\u65e5\u671f\u503c\uff0c\u6839\u64da\u6307\u5b9a\u7684\u683c\u5f0f\u8fd4\u56de\u65e5\u671f\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DATE_FORMAT(date, format)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>date<\/code> \u662f\u8981\u683c\u5f0f\u5316\u7684\u65e5\u671f\uff0c<code>format<\/code> \u662f\u683c\u5f0f\u5b57\u7b26\u4e32\u3002\u683c\u5f0f\u5b57\u7b26\u4e32\u53ef\u4ee5\u5305\u542b\u591a\u7a2e\u683c\u5f0f\u7b26\u865f\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><code>%Y<\/code> &#8211; \u56db\u4f4d\u6578\u5e74\u4efd<\/li>\n<li><code>%y<\/code> &#8211; \u5169\u4f4d\u6578\u5e74\u4efd<\/li>\n<li><code>%m<\/code> &#8211; \u6708\u4efd\uff0801 \u5230 12\uff09<\/li>\n<li><code>%d<\/code> &#8211; \u65e5\uff0801 \u5230 31\uff09<\/li>\n<li><code>%H<\/code> &#8211; \u5c0f\u6642\uff0800 \u5230 23\uff09<\/li>\n<li><code>%i<\/code> &#8211; \u5206\u9418\uff0800 \u5230 59\uff09<\/li>\n<li><code>%s<\/code> &#8211; \u79d2\uff0800 \u5230 59\uff09<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u201cYYYY-MM-DD\u201d\u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT DATE_FORMAT(NOW(), '%Y-%m-%d');<\/code><\/pre>\n<h2 id=\"2-str_to_date-%e5%87%bd%e6%95%b8-cgnBWwxySM\">2. STR_TO_DATE \u51fd\u6578<\/h2>\n<p>STR_TO_DATE \u51fd\u6578\u7528\u65bc\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>STR_TO_DATE(str, format)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>str<\/code> \u662f\u8981\u8f49\u63db\u7684\u5b57\u7b26\u4e32\uff0c<code>format<\/code> \u662f\u5b57\u7b26\u4e32\u7684\u683c\u5f0f\u3002\u9019\u5c0d\u65bc\u5f9e\u975e\u6a19\u6e96\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u65e5\u671f\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5c07\u5b57\u7b26\u4e32\u201c31-12-2023\u201d\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT STR_TO_DATE('31-12-2023', '%d-%m-%Y');<\/code><\/pre>\n<h2 id=\"3-unix_timestamp-%e5%87%bd%e6%95%b8-cgnBWwxySM\">3. UNIX_TIMESTAMP \u51fd\u6578<\/h2>\n<p>UNIX_TIMESTAMP \u51fd\u6578\u7528\u65bc\u8fd4\u56de\u81ea1970\u5e741\u67081\u65e5\u4ee5\u4f86\u7684\u79d2\u6578\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9032\u884c\u6642\u9593\u6233\u8a08\u7b97\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UNIX_TIMESTAMP(date)<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u7372\u53d6\u7576\u524d\u6642\u9593\u7684 UNIX \u6642\u9593\u6233\uff1a<\/p>\n<pre><code>SELECT UNIX_TIMESTAMP(NOW());<\/code><\/pre>\n<h2 id=\"4-from_unixtime-%e5%87%bd%e6%95%b8-cgnBWwxySM\">4. FROM_UNIXTIME \u51fd\u6578<\/h2>\n<p>FROM_UNIXTIME \u51fd\u6578\u5247\u662f\u5c07 UNIX \u6642\u9593\u6233\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>FROM_UNIXTIME(unix_timestamp, format)<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07 UNIX \u6642\u9593\u6233\u8f49\u63db\u70ba\u201cYYYY-MM-DD\u201d\u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT FROM_UNIXTIME(1672531199, '%Y-%m-%d');<\/code><\/pre>\n<h2 id=\"5-date_add-%e5%92%8c-date_sub-%e5%87%bd%e6%95%b8-cgnBWwxySM\">5. DATE_ADD \u548c DATE_SUB \u51fd\u6578<\/h2>\n<p>\u9019\u5169\u500b\u51fd\u6578\u7528\u65bc\u5728\u65e5\u671f\u4e0a\u52a0\u4e0a\u6216\u6e1b\u53bb\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DATE_ADD(date, INTERVAL expr unit)<\/code><\/pre>\n<pre><code>DATE_SUB(date, INTERVAL expr unit)<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07\u7576\u524d\u65e5\u671f\u52a0\u4e0a 10 \u5929\uff1a<\/p>\n<pre><code>SELECT DATE_ADD(NOW(), INTERVAL 10 DAY);<\/code><\/pre>\n<p>\u800c\u6e1b\u53bb 5 \u5929\u5247\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT DATE_SUB(NOW(), INTERVAL 5 DAY);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cgnBWwxySM\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u683c\u5f0f\u8f49\u63db\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u67e5\u8a62\u4e2d\u9748\u6d3b\u5730\u8655\u7406\u65e5\u671f\u6578\u64da\u3002\u7121\u8ad6\u662f\u683c\u5f0f\u5316\u65e5\u671f\u3001\u8f49\u63db\u5b57\u7b26\u4e32\u70ba\u65e5\u671f\uff0c\u9084\u662f\u9032\u884c\u6642\u9593\u6233\u8a08\u7b97\uff0c\u9019\u4e9b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u5728\u9999\u6e2f\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u4e9b\u51fd\u6578\u5c07\u5927\u5927\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 MySQL \u4e2d\u65e5\u671f\u683c\u5f0f\u8f49\u63db\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u8f15\u9b06\u8655\u7406\u548c\u683c\u5f0f\u5316\u65e5\u671f\u6578\u64da\uff0c\u63d0\u5347\u67e5\u8a62\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-75826","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75826","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=75826"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75826\/revisions"}],"predecessor-version":[{"id":75827,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75826\/revisions\/75827"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}