{"id":161113,"date":"2024-11-04T03:43:24","date_gmt":"2024-11-03T19:43:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161113\/"},"modified":"2024-11-04T03:43:25","modified_gmt":"2024-11-03T19:43:25","slug":"%e7%8d%b2%e5%be%97%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e7%9a%84-mysql-%e5%87%bd%e6%95%b8-now","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161113\/","title":{"rendered":"\u7372\u5f97\u7576\u524d\u65e5\u671f\u6642\u9593\u7684 mysql \u51fd\u6578 now()"},"content":{"rendered":"<h1 id=\"%e7%8d%b2%e5%be%97%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e7%9a%84-mysql-%e5%87%bd%e6%95%b8-now-HtgvfEIFuo\">\u7372\u5f97\u7576\u524d\u65e5\u671f\u6642\u9593\u7684 MySQL \u51fd\u6578 now()<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6642\u9593\u548c\u65e5\u671f\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u5176\u4e2d <code>NOW()<\/code> \u51fd\u6578\u662f\u6700\u5e38\u7528\u7684\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>NOW()<\/code> \u51fd\u6578\u7684\u7528\u6cd5\u3001\u7279\u6027\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-now-%e5%87%bd%e6%95%b8%ef%bc%9f-HtgvfEIFuo\">\u4ec0\u9ebc\u662f NOW() \u51fd\u6578\uff1f<\/h2>\n<p><code>NOW()<\/code> \u51fd\u6578\u662f\u4e00\u500b MySQL \u7684\u5167\u5efa\u51fd\u6578\uff0c\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u5b83\u8fd4\u56de\u7684\u7d50\u679c\u662f\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\u3002\u9019\u500b\u51fd\u6578\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u6642\u9593\u3001\u66f4\u65b0\u6642\u9593\u7b49\u3002<\/p>\n<h2 id=\"now-%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-HtgvfEIFuo\">NOW() \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>SELECT NOW();<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0 SQL \u8a9e\u53e5\u5f8c\uff0cMySQL \u5c07\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u4f8b\u5982\uff0c\u8fd4\u56de\u7d50\u679c\u53ef\u80fd\u662f &#8216;2023-10-01 14:30:00&#8217;\u3002<\/p>\n<h2 id=\"now-%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-HtgvfEIFuo\">NOW() \u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b <code>NOW()<\/code> \u51fd\u6578\u7684\u5e38\u898b\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u8a18\u9304\u6578\u64da\u5275\u5efa\u6642\u9593\uff1a<\/strong>\u5728\u63d2\u5165\u65b0\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>NOW()<\/code> \u51fd\u6578\u81ea\u52d5\u586b\u5145\u5275\u5efa\u6642\u9593\u3002<\/li>\n<li><strong>\u66f4\u65b0\u6578\u64da\u7684\u6642\u9593\u6233\uff1a<\/strong>\u5728\u66f4\u65b0\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>NOW()<\/code> \u51fd\u6578\u4f86\u8a18\u9304\u6700\u5f8c\u66f4\u65b0\u7684\u6642\u9593\u3002<\/li>\n<li><strong>\u8a08\u7b97\u6642\u9593\u5dee\uff1a<\/strong>\u53ef\u4ee5\u5229\u7528 <code>NOW()<\/code> \u51fd\u6578\u4f86\u8a08\u7b97\u7576\u524d\u6642\u9593\u8207\u67d0\u500b\u6642\u9593\u9ede\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-now-%e5%87%bd%e6%95%b8%e7%9a%84%e7%a4%ba%e4%be%8b-HtgvfEIFuo\">\u4f7f\u7528 NOW() \u51fd\u6578\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>NOW()<\/code> \u51fd\u6578\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-1%ef%bc%9a%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%e6%99%82%e8%a8%98%e9%8c%84%e5%89%b5%e5%bb%ba%e6%99%82%e9%96%93-HtgvfEIFuo\">\u793a\u4f8b 1\uff1a\u63d2\u5165\u6578\u64da\u6642\u8a18\u9304\u5275\u5efa\u6642\u9593<\/h3>\n<pre><code>INSERT INTO users (username, created_at) VALUES ('john_doe', NOW());<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u7528\u6236 &#8216;john_doe&#8217; \u88ab\u63d2\u5165\u5230 <code>users<\/code> \u8868\u4e2d\u6642\uff0c<code>created_at<\/code> \u6b04\u4f4d\u5c07\u81ea\u52d5\u586b\u5145\u70ba\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-2%ef%bc%9a%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e6%99%82%e8%a8%98%e9%8c%84%e6%9c%80%e5%be%8c%e6%9b%b4%e6%96%b0%e6%99%82%e9%96%93-HtgvfEIFuo\">\u793a\u4f8b 2\uff1a\u66f4\u65b0\u6578\u64da\u6642\u8a18\u9304\u6700\u5f8c\u66f4\u65b0\u6642\u9593<\/h3>\n<pre><code>UPDATE users SET last_login = NOW() WHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u7528\u6236 &#8216;john_doe&#8217; \u767b\u9304\u6642\uff0c<code>last_login<\/code> \u6b04\u4f4d\u5c07\u88ab\u66f4\u65b0\u70ba\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-3%ef%bc%9a%e8%a8%88%e7%ae%97%e6%99%82%e9%96%93%e5%b7%ae-HtgvfEIFuo\">\u793a\u4f8b 3\uff1a\u8a08\u7b97\u6642\u9593\u5dee<\/h3>\n<pre><code>SELECT TIMESTAMPDIFF(MINUTE, created_at, NOW()) AS minutes_since_creation FROM users WHERE username = 'john_doe';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u8a08\u7b97\u4e86\u7528\u6236 &#8216;john_doe&#8217; \u5275\u5efa\u4ee5\u4f86\u7684\u5206\u9418\u6578\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-HtgvfEIFuo\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528 <code>NOW()<\/code> \u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li><strong>\u6642\u5340\u8a2d\u5b9a\uff1a<\/strong>\u78ba\u4fdd MySQL \u7684\u6642\u5340\u8a2d\u5b9a\u6b63\u78ba\uff0c\u5426\u5247\u8fd4\u56de\u7684\u6642\u9593\u53ef\u80fd\u4e0d\u7b26\u5408\u9810\u671f\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u5728\u9ad8\u983b\u7387\u7684\u67e5\u8a62\u4e2d\uff0c\u904e\u5ea6\u4f7f\u7528 <code>NOW()<\/code> \u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u5efa\u8b70\u6839\u64da\u5be6\u969b\u9700\u6c42\u5408\u7406\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-HtgvfEIFuo\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u7684 <code>NOW()<\/code> \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u8f15\u9b06\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u4e26\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u81ea\u52d5\u8a18\u9304\u6642\u9593\u6233\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5275\u5efa\u3001\u66f4\u65b0\u9084\u662f\u6642\u9593\u8a08\u7b97\u65b9\u9762\uff0c<code>NOW()<\/code> \u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6642\u9593\u7684\u61c9\u7528\u4f86\u8aaa\uff0c\u638c\u63e1 <code>NOW()<\/code> \u51fd\u6578\u7684\u4f7f\u7528\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u500b\u4eba\u9805\u76ee\u9084\u662f\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528 MySQL \u51fd\u6578 NOW() \u7372\u53d6\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\uff0c\u65b9\u4fbf\u9032\u884c\u6578\u64da\u8a18\u9304\u548c\u6642\u9593\u6233\u7ba1\u7406\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-161113","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161113","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=161113"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161113\/revisions"}],"predecessor-version":[{"id":161114,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161113\/revisions\/161114"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}