{"id":76378,"date":"2024-10-16T06:10:16","date_gmt":"2024-10-15T22:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76378\/"},"modified":"2024-10-16T06:10:16","modified_gmt":"2024-10-15T22:10:16","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%abtimestamp%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e5%b9%be%e5%80%8b%e6%87%89%e7%94%a8%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76378\/","title":{"rendered":"MySQL\u6578\u64da\u5eabTIMESTAMP\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u5e7e\u500b\u61c9\u7528\u5be6\u4f8b"},"content":{"rendered":"

MySQL\u6578\u64da\u5eabTIMESTAMP\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u5e7e\u500b\u61c9\u7528\u5be6\u4f8b<\/h1>\n

\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002TIMESTAMP\u6578\u64da\u985e\u578b\u5728MySQL\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\uff0c\u7279\u5225\u662f\u5728\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u548c\u66f4\u65b0\u6642\u9593\u65b9\u9762\u3002\u672c\u6587\u5c07\u63a2\u8a0eTIMESTAMP\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u53ca\u5176\u5e7e\u500b\u5be6\u969b\u61c9\u7528\u5be6\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662fTIMESTAMP\uff1f<\/h2>\n

TIMESTAMP\u662f\u4e00\u7a2e\u6578\u64da\u985e\u578b\uff0c\u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\u3002\u5b83\u7684\u7bc4\u570d\u5f9e1970\u5e741\u67081\u65e5\u52302038\u5e741\u670819\u65e5\uff0c\u4e26\u4e14\u53ef\u4ee5\u81ea\u52d5\u66f4\u65b0\u3002TIMESTAMP\u7684\u7279\u9ede\u5728\u65bc\u5b83\u80fd\u5920\u6839\u64da\u6642\u5340\u81ea\u52d5\u8abf\u6574\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u5168\u7403\u5316\u61c9\u7528\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n

TIMESTAMP\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e<\/h2>\n

\u5728MySQL\u4e2d\uff0cTIMESTAMP\u5b57\u6bb5\u53ef\u4ee5\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u9019\u6a23\u5728\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c\u5982\u679c\u6c92\u6709\u63d0\u4f9b\u8a72\u5b57\u6bb5\u7684\u503c\uff0c\u5247\u6703\u81ea\u52d5\u586b\u5165\u9ed8\u8a8d\u503c\u3002\u9ed8\u8a8d\u503c\u53ef\u4ee5\u662f\u7576\u524d\u6642\u9593\uff0c\u4e5f\u53ef\u4ee5\u662f\u7279\u5b9a\u7684\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n

CREATE TABLE example (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,\n    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0ccreated_at<\/code>\u5b57\u6bb5\u5728\u8a18\u9304\u5275\u5efa\u6642\u81ea\u52d5\u586b\u5165\u7576\u524d\u6642\u9593\uff0c\u800cupdated_at<\/code>\u5b57\u6bb5\u5247\u5728\u6bcf\u6b21\u66f4\u65b0\u6642\u81ea\u52d5\u66f4\u65b0\u70ba\u7576\u524d\u6642\u9593\u3002<\/p>\n
\u61c9\u7528\u5be6\u4f8b<\/h2>\n
1. \u8a18\u9304\u6578\u64da\u5275\u5efa\u6642\u9593<\/h3>\n
\u5728\u8a31\u591a\u61c9\u7528\u4e2d\uff0c\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u6642\u9593\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u7528\u6236\u8a3b\u518a\u7cfb\u7d71\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528TIMESTAMP\u4f86\u8a18\u9304\u7528\u6236\u7684\u8a3b\u518a\u6642\u9593\uff1a<\/p>\n
CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n
\u9019\u6a23\uff0c\u6bcf\u7576\u65b0\u7528\u6236\u8a3b\u518a\u6642\uff0ccreated_at<\/code>\u5b57\u6bb5\u6703\u81ea\u52d5\u586b\u5165\u7576\u524d\u6642\u9593\uff0c\u65b9\u4fbf\u5f8c\u7e8c\u7684\u6578\u64da\u5206\u6790\u548c\u7ba1\u7406\u3002<\/p>\n
2. \u8a18\u9304\u6578\u64da\u66f4\u65b0\u6642\u9593<\/h3>\n
\u9664\u4e86\u5275\u5efa\u6642\u9593\uff0c\u8a18\u9304\u6578\u64da\u7684\u6700\u5f8c\u66f4\u65b0\u6642\u9593\u540c\u6a23\u91cd\u8981\u3002\u5728\u4e00\u500b\u5167\u5bb9\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528TIMESTAMP\u4f86\u8ddf\u8e64\u6587\u7ae0\u7684\u6700\u5f8c\u66f4\u65b0\u6642\u9593\uff1a<\/p>\n
CREATE TABLE articles (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    title VARCHAR(100) NOT NULL,\n    content TEXT NOT NULL,\n    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP\n);<\/code><\/pre>\n
\u9019\u6a23\uff0c\u6bcf\u7576\u6587\u7ae0\u88ab\u7de8\u8f2f\u6642\uff0cupdated_at<\/code>\u5b57\u6bb5\u6703\u81ea\u52d5\u66f4\u65b0\u70ba\u7576\u524d\u6642\u9593\uff0c\u65b9\u4fbf\u7528\u6236\u4e86\u89e3\u5167\u5bb9\u7684\u6700\u65b0\u72c0\u614b\u3002<\/p>\n
3. \u5be6\u73fe\u6578\u64da\u904e\u671f\u6a5f\u5236<\/h3>\n
\u5728\u67d0\u4e9b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u8a2d\u7f6e\u6578\u64da\u7684\u904e\u671f\u6642\u9593\u3002\u53ef\u4ee5\u901a\u904eTIMESTAMP\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u512a\u60e0\u5238\u7cfb\u7d71\u4e2d\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u512a\u60e0\u5238\u7684\u6709\u6548\u671f\uff1a<\/p>\n
CREATE TABLE coupons (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    code VARCHAR(50) NOT NULL,\n    expires_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP + INTERVAL 30 DAY\n);<\/code><\/pre>\n
\u9019\u6a23\uff0c\u512a\u60e0\u5238\u5728\u5275\u5efa\u6642\u6703\u81ea\u52d5\u8a2d\u7f6e\u70ba30\u5929\u5f8c\u904e\u671f\uff0c\u65b9\u4fbf\u7cfb\u7d71\u81ea\u52d5\u7ba1\u7406\u904e\u671f\u7684\u512a\u60e0\u5238\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
MySQL\u4e2d\u7684TIMESTAMP\u6578\u64da\u985e\u578b\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6642\u9593\u7ba1\u7406\u529f\u80fd\uff0c\u901a\u904e\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u548c\u66f4\u65b0\u6642\u9593\uff0c\u4e26\u5be6\u73fe\u6578\u64da\u7684\u904e\u671f\u7ba1\u7406\u3002\u9019\u4e9b\u529f\u80fd\u5728\u5404\u7a2e\u61c9\u7528\u4e2d\u90fd\u5177\u6709\u91cd\u8981\u7684\u5be6\u7528\u50f9\u503c\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\u82e5\u60a8\u5c0d\u65bc\u9999\u6e2fVPS<\/a><\/code>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MySQL\u6578\u64da\u5eab\u4e2dTIMESTAMP\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u61c9\u7528\u5be6\u4f8b\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u8207\u6e96\u78ba\u6027\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-76378","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76378","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=76378"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76378\/revisions"}],"predecessor-version":[{"id":76379,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76378\/revisions\/76379"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}