{"id":160111,"date":"2024-11-03T20:22:20","date_gmt":"2024-11-03T12:22:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160111\/"},"modified":"2024-11-03T20:22:21","modified_gmt":"2024-11-03T12:22:21","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-current_timestamp","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160111\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase CURRENT_TIMESTAMP"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-current_timestamp-oXqbUMuOhJ\">OceanBase \u6559\u7a0b\uff1aOceanBase CURRENT_TIMESTAMP<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6642\u9593\u6233\u7684\u4f7f\u7528\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u6642\u9593\u654f\u611f\u7684\u6578\u64da\u6642\u3002OceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6642\u9593\u6233\u529f\u80fd\uff0c\u5176\u4e2d <code>CURRENT_TIMESTAMP<\/code> \u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u51fd\u6578\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d <code>CURRENT_TIMESTAMP<\/code> \u7684\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-current_timestamp%ef%bc%9f-oXqbUMuOhJ\">\u4ec0\u9ebc\u662f CURRENT_TIMESTAMP\uff1f<\/h2>\n<p><code>CURRENT_TIMESTAMP<\/code> \u662f\u4e00\u500b SQL \u51fd\u6578\uff0c\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u5b83\u8fd4\u56de\u7684\u503c\u662f\u6839\u64da\u6578\u64da\u5eab\u4f3a\u670d\u5668\u7684\u7cfb\u7d71\u6642\u9593\u4f86\u751f\u6210\u7684\uff0c\u901a\u5e38\u4ee5 UTC \u6642\u5340\u8868\u793a\u3002\u9019\u500b\u51fd\u6578\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u6642\u9593\u6216\u66f4\u65b0\u6642\u9593\u3002<\/p>\n<h2 id=\"current_timestamp-%e7%9a%84%e8%aa%9e%e6%b3%95-oXqbUMuOhJ\">CURRENT_TIMESTAMP \u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c\u4f7f\u7528 <code>CURRENT_TIMESTAMP<\/code> \u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT CURRENT_TIMESTAMP;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u901a\u5e38\u70ba <code>YYYY-MM-DD HH:MM:SS<\/code>\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-oXqbUMuOhJ\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>CURRENT_TIMESTAMP<\/code> \u7684\u5be6\u969b\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%99%82%e4%bd%bf%e7%94%a8-current_timestamp-oXqbUMuOhJ\">1. \u5275\u5efa\u8868\u6642\u4f7f\u7528 CURRENT_TIMESTAMP<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>CURRENT_TIMESTAMP<\/code> \u4f5c\u70ba\u9ed8\u8a8d\u503c\u4f86\u81ea\u52d5\u586b\u5145\u5275\u5efa\u6642\u9593\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    username VARCHAR(50),\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u63d2\u5165\u65b0\u7528\u6236\u6642\uff0c<code>created_at<\/code> \u6b04\u4f4d\u5c07\u81ea\u52d5\u586b\u5165\u7576\u524d\u7684\u6642\u9593\u6233\u3002<\/p>\n<h3 id=\"2-%e6%9b%b4%e6%96%b0%e8%a8%98%e9%8c%84%e6%99%82%e4%bd%bf%e7%94%a8-current_timestamp-oXqbUMuOhJ\">2. \u66f4\u65b0\u8a18\u9304\u6642\u4f7f\u7528 CURRENT_TIMESTAMP<\/h3>\n<p>\u5728\u66f4\u65b0\u8a18\u9304\u6642\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 <code>CURRENT_TIMESTAMP<\/code> \u4f86\u8a18\u9304\u6700\u5f8c\u66f4\u65b0\u7684\u6642\u9593\uff1a<\/p>\n<pre><code>UPDATE users\nSET username = 'new_username', updated_at = CURRENT_TIMESTAMP\nWHERE id = 1;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u6b21\u66f4\u65b0\u7528\u6236\u4fe1\u606f\u6642\uff0c\u90fd\u80fd\u8a18\u9304\u4e0b\u6700\u65b0\u7684\u6642\u9593\u6233\u3002<\/p>\n<h2 id=\"current_timestamp-%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-oXqbUMuOhJ\">CURRENT_TIMESTAMP \u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>CURRENT_TIMESTAMP<\/code> \u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5be9\u8a08\uff1a<\/strong>\u901a\u904e\u8a18\u9304\u5275\u5efa\u548c\u66f4\u65b0\u7684\u6642\u9593\u6233\uff0c\u53ef\u4ee5\u8f15\u9b06\u8ffd\u8e64\u6578\u64da\u7684\u8b8a\u66f4\u6b77\u53f2\u3002<\/li>\n<li><strong>\u5831\u544a\u751f\u6210\uff1a<\/strong>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u7576\u524d\u6642\u9593\u6233\u4f86\u6a19\u8a18\u5831\u544a\u7684\u751f\u6210\u6642\u9593\u3002<\/li>\n<li><strong>\u4e8b\u4ef6\u8a18\u9304\uff1a<\/strong>\u5728\u4e8b\u4ef6\u9a45\u52d5\u7684\u7cfb\u7d71\u4e2d\uff0c\u8a18\u9304\u4e8b\u4ef6\u767c\u751f\u7684\u6642\u9593\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-oXqbUMuOhJ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>CURRENT_TIMESTAMP<\/code> \u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u6642\u9593\u6233\u7684\u7cbe\u5ea6\uff1a\u6839\u64da OceanBase \u7684\u7248\u672c\u548c\u914d\u7f6e\uff0c<code>CURRENT_TIMESTAMP<\/code> \u7684\u7cbe\u5ea6\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\uff0c\u901a\u5e38\u70ba\u79d2\u7d1a\u3002<\/li>\n<li>\u6642\u5340\u554f\u984c\uff1a\u78ba\u4fdd\u4e86\u89e3\u6578\u64da\u5eab\u4f3a\u670d\u5668\u7684\u6642\u5340\u8a2d\u7f6e\uff0c\u4ee5\u907f\u514d\u56e0\u6642\u5340\u5dee\u7570\u5c0e\u81f4\u7684\u6642\u9593\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-oXqbUMuOhJ\">\u7e3d\u7d50<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c<code>CURRENT_TIMESTAMP<\/code> \u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u7ba1\u7406\u548c\u8a18\u9304\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5275\u5efa\u3001\u66f4\u65b0\u9084\u662f\u5be9\u8a08\u65b9\u9762\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u91cd\u8981\u7684\u652f\u6301\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to use OceanBase CURRENT_TIMESTAMP in our comprehensive tutorial, enhancing your database management skills with real-time timestamp functionality.<\/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-160111","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160111","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=160111"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160111\/revisions"}],"predecessor-version":[{"id":160112,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160111\/revisions\/160112"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}