{"id":41498,"date":"2023-08-03T20:46:13","date_gmt":"2023-06-21T09:35:33","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e5%bd%93%e5%89%8d%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4\/"},"modified":"2024-04-30T16:50:00","modified_gmt":"2024-04-30T08:50:00","slug":"%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e5%bd%93%e5%89%8d%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e5%bd%93%e5%89%8d%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4\/","title":{"rendered":"\u5728PostgreSQL\u4e2d\u7684&#8221;\u5f53\u524d\u65e5\u671f\u65f6\u95f4&#8221;"},"content":{"rendered":"<h1>\u73b0\u5728\u6709\u5f88\u591a\u4e0d\u540c\u7684\u8868\u8fbe\u65b9\u5f0f\u6765\u8868\u793a\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/h1>\n<p>\u6211\u5728PostgreSQL 13\u7684\u65e5\u6587\u6587\u6863\u4e2d\u6ce8\u610f\u5230\u4e869.9.4\u90e8\u5206\uff0c\u8be5\u90e8\u5206\u662f\u5173\u4e8e\u89c2\u5bdf\u5f53\u524d\u65e5\u671f\/\u65f6\u95f4\u7684\u5185\u5bb9\uff0c\u6211\u5c06\u5176\u8bb0\u5f55\u4e0b\u6765\u3002<\/p>\n<p>\u5728PostgreSQL\u4e2d\u5b58\u5728\u591a\u79cd\u8868\u793a\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u7684\u8868\u8fbe\u65b9\u5f0f\u3002<\/p>\n<h2>\u5f53\u524d\u65e5\u671f\uff0c\u5f53\u524d\u65f6\u95f4\uff0c\u5f53\u524d\u65f6\u95f4\u6233\uff0c\u672c\u5730\u65f6\u95f4\uff0c\u672c\u5730\u65f6\u95f4\u6233<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">SELECT<\/span> \r\n  <span class=\"k\">CURRENT_DATE<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">CURRENT_TIME<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">CURRENT_TIMESTAMP<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">CURRENT_TIME<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">),<\/span>\r\n  <span class=\"k\">CURRENT_TIMESTAMP<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">),<\/span>\r\n  <span class=\"k\">LOCALTIME<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">LOCALTIMESTAMP<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">LOCALTIME<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">),<\/span>\r\n  <span class=\"k\">LOCALTIMESTAMP<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d476437434c4406ca837b\/5-0.png\" alt=\"Snap_20220527_115607_00.png\" \/><\/div>\n<p>\u5728\u8fd9\u4e2a\u5904\u7406\u7cfb\u7edf\u4e2d\uff0c\u867d\u7136\u63d0\u4f9b\u4e86\u7cbe\u786e\u5230\u79d2\u4ee5\u4e0b6\u4f4d\u7684\u529f\u80fd\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u7cbe\u5ea6\u6765\u8fdb\u884c\u56db\u820d\u4e94\u5165\u5904\u7406\u3002\u9644\u52a0\u7684&#8221;+09&#8243;\u8868\u793a\u5e26\u6709\u65f6\u533a\u4fe1\u606f\u3002<\/p>\n<h2>\u83b7\u53d6\u4ea4\u6613\u65f6\u95f4\u6233(), \u83b7\u53d6\u8bed\u53e5\u65f6\u95f4\u6233(), \u83b7\u53d6\u7cfb\u7edf\u65f6\u95f4\u6233(), \u83b7\u53d6\u65f6\u95f4\u548c\u65e5\u671f\u4fe1\u606f(), \u83b7\u53d6\u5f53\u524d\u65f6\u95f4()<\/h2>\n<p>\u6211\u5c06\u5168\u90e8\u5f15\u7528\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n<blockquote><p>transaction_timestamp()\uff08\u4ea4\u6613\u65f6\u95f4\u6233\uff09\u4e0eCURRENT_TIMESTAMP\uff08\u5f53\u524d\u65f6\u95f4\u6233\uff09\u7b49\u4ef7\uff0c\u4f46\u5176\u540d\u79f0\u53cd\u6620\u4e86\u5176\u660e\u786e\u8fd4\u56de\u7684\u5185\u5bb9\u3002<br \/>\nstatement_timestamp()\uff08\u8bed\u53e5\u65f6\u95f4\u6233\uff09\u8fd4\u56de\u5f53\u524d\u8bed\u53e5\u7684\u6267\u884c\u5f00\u59cb\u65f6\u95f4\uff08\u66f4\u5177\u4f53\u5730\u8bf4\uff0c\u662f\u63a5\u6536\u5230\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u524d\u4e00\u4e2a\u547d\u4ee4\u6d88\u606f\u7684\u65f6\u95f4\uff09\u3002statement_timestamp()\u548ctransaction_timestamp()\u5728\u4e8b\u52a1\u7684\u7b2c\u4e00\u4e2a\u547d\u4ee4\u4e2d\u8fd4\u56de\u76f8\u540c\u7684\u503c\uff0c\u4f46\u5728\u968f\u540e\u7684\u547d\u4ee4\u4e2d\u53ef\u80fd\u4f1a\u6709\u4e0d\u540c\u7684\u503c\u3002<br \/>\nclock_timestamp()(\u65f6\u949f\u65f6\u95f4\u6233)\u8fd4\u56de\u5b9e\u9645\u5f53\u524d\u65f6\u95f4\uff0c\u56e0\u6b64\u5373\u4f7f\u5728\u5355\u4e2aSQL\u547d\u4ee4\u4e2d\u4e5f\u53ef\u80fd\u4e0d\u540c\u3002<br \/>\ntimeofday()\uff08\u65f6\u95f4\u4e4b\u65e5\uff09\u662fPostgreSQL\u7684\u5386\u53f2\u51fd\u6570\u3002\u7c7b\u4f3c\u4e8eclock_timestamp()\uff0c\u5b83\u8fd4\u56de\u5b9e\u9645\u5f53\u524d\u65f6\u95f4\uff0c\u4f46\u4e0d\u662ftimestamp with time zone\uff08\u5e26\u6709\u65f6\u533a\u7684\u65f6\u95f4\u6233\uff09\u7c7b\u578b\u7684\u503c\uff0c\u800c\u662f\u683c\u5f0f\u5316\u7684\u6587\u672c\u5b57\u7b26\u4e32\u3002<br \/>\nnow()\uff08\u5f53\u524d\u65f6\u95f4\uff09\u4e0etransaction_timestamp()(\u4ea4\u6613\u65f6\u95f4\u6233)\u76f8\u540c\uff0c\u662f\u4f20\u7edf\u7684PostgreSQL\u51fd\u6570\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"k\">SELECT<\/span> \r\n  <span class=\"n\">transaction_timestamp<\/span><span class=\"p\">(),<\/span> <span class=\"n\">statement_timestamp<\/span><span class=\"p\">(),<\/span> <span class=\"n\">clock_timestamp<\/span><span class=\"p\">(),<\/span> <span class=\"n\">timeofday<\/span><span class=\"p\">(),<\/span> <span class=\"n\">now<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d476437434c4406ca837b\/11-0.png\" alt=\"Snap_20220527_120204_00.png\" \/><\/div>\n<p>\u5982\u679c\u5355\u72ec\u6267\u884c\u8fd9\u4e2aSELECT\u8bed\u53e5\uff0c\u610f\u4e49\u5e76\u4e0d\u592a\u5927\uff0c\u6b63\u5982\u8bf4\u660e\u6240\u8ff0\uff0c\u53ea\u6709\u5728\u4e8b\u52a1\u5904\u7406\u4e2d\u4f7f\u7528\u5b83\u65f6\uff0c\u624d\u4f1a\u5e26\u6765\u5404\u79cd\u5dee\u5f02\u3002<\/p>\n<h1>\u601d\u8003\u5982\u4f55\u4f7f\u7528<\/h1>\n<p>\u5982\u679c\u60f3\u8bb0\u5f55\u6267\u884cINSERT\u6216UPDATE\u8bed\u53e5\u7684\u5b9e\u9645\u65f6\u95f4\uff08\u4f8b\u5982create_at\u6216update_at\u7b49\uff09\uff0c\u4f7f\u7528transaction_timestamp()\u548cclock_timestamp()\u54ea\u4e2a\u66f4\u597d\u5462\uff1f\u6211\u8ba4\u4e3a\u8fd9\u53d6\u51b3\u4e8e\u601d\u8003\u65b9\u5f0f\uff0c\u4f46\u5982\u679c\u5c06\u4e00\u7cfb\u5217\u6570\u636e\u66f4\u65b0\u5904\u7406\u89c6\u4e3a\u4e00\u4e2a\u6574\u4f53\uff0c\u5219\u8ba4\u4e3a\u4f7f\u7528transaction_timestamp()\u66f4\u5408\u7406\u3002\u5728\u8de8\u591a\u4e2a\u8868\u7684\u957f\u65f6\u95f4\u5904\u7406\u4e2d\uff0c\u4fdd\u8bc1\u8d77\u59cb\u65f6\u95f4\u548c\u7ed3\u675f\u65f6\u95f4\u4e00\u81f4\u7684\u662ftransaction_timestamp()\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u6ce8\u91cd\u5b9e\u9645\u65f6\u95f4\uff0c\u5219\u53ef\u80fd\u4f1a\u9009\u62e9clock_timestamp()\u3002\u5b83\u4e5f\u53ef\u4ee5\u7528\u4e8e\u6d4b\u91cf\u7279\u5b9a\u67e5\u8be2\u7684\u5904\u7406\u65f6\u95f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u73b0\u5728\u6709\u5f88\u591a\u4e0d\u540c\u7684\u8868\u8fbe\u65b9\u5f0f\u6765\u8868\u793a\u65e5\u671f\u548c\u65f6\u95f4\u3002 \u6211\u5728PostgreSQL 13\u7684\u65e5\u6587\u6587\u6863\u4e2d\u6ce8\u610f\u5230\u4e869.9.4\u90e8\u5206\uff0c [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41498","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5728PostgreSQL\u4e2d\u7684&quot;\u5f53\u524d\u65e5\u671f\u65f6\u95f4&quot; - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728postgresql\u4e2d\u7684\u5f53\u524d\u65e5\u671f\u65f6\u95f4\/\" \/>\n<meta property=\"og:locale\" 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