{"id":200097,"date":"2025-05-06T09:13:02","date_gmt":"2025-05-06T01:13:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200097\/"},"modified":"2025-05-06T09:13:02","modified_gmt":"2025-05-06T01:13:02","slug":"%e6%b7%b1%e5%85%a5%e6%8e%a2%e8%ae%a8mysql%e4%b8%ad%e6%97%b6%e9%97%b4%e6%88%b3%e7%9a%84%e5%ae%9a%e4%b9%89%e5%92%8c%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200097\/","title":{"rendered":"\u6df1\u5165\u63a2\u8ba8MySQL\u4e2d\u65f6\u95f4\u6233\u7684\u5b9a\u4e49\u548c\u7528\u6cd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u6df1\u5165\u63a2\u8ba8MySQL\u4e2d\u65f6\u95f4\u6233\u7684\u5b9a\u4e49\u548c\u7528\u6cd5<\/h1>\n

MySQL \u4e2d\u7684\u65f6\u95f4\u6233\uff08TIMESTAMP\uff09\u662f\u4e00\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u4fe1\u606f\uff0c\u5e76\u5177\u6709\u81ea\u52a8\u66f4\u65b0\u529f\u80fd\u3002\u5728\u521b\u5efa\u8868\u65f6\uff0c\u53ef\u5b9a\u4e49\u65f6\u95f4\u6233\u5b57\u6bb5\u5e76\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u4e3a\u5f53\u524d\u65f6\u95f4\uff0c\u4ece\u800c\u5728\u63d2\u5165\u65b0\u6570\u636e\u65f6\u81ea\u52a8\u8bb0\u5f55\u65f6\u95f4\u6233\u3002\u65f6\u95f4\u6233\u8fd8\u53ef\u901a\u8fc7 ON UPDATE CURRENT_TIMESTAMP \u5c5e\u6027\u5728\u66f4\u65b0\u6570\u636e\u65f6\u81ea\u52a8\u66f4\u65b0\u3002\u67e5\u8be2\u6570\u636e\u65f6\uff0c\u53ef\u4f7f\u7528\u65f6\u95f4\u6233\u5b57\u6bb5\u8fdb\u884c\u6761\u4ef6\u7b5b\u9009\u6216\u6392\u5e8f\uff0c\u5e2e\u52a9\u8ffd\u8e2a\u6570\u636e\u7684\u53d8\u5316\u548c\u64cd\u4f5c\u65f6\u95f4\u3002<\/p>\n

MySQL\u65f6\u95f4\u6233\u7684\u5b9a\u4e49\u53ca\u4f7f\u7528\u65b9\u6cd5\u8be6\u89e3<\/p>\n

\u5728MySQL\u4e2d\uff0c\u65f6\u95f4\u6233\uff08timestamp\uff09\u662f\u4e00\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u7528\u6765\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u4fe1\u606f\u3002\u65f6\u95f4\u6233\u901a\u5e38\u7528\u4e8e\u8bb0\u5f55\u6570\u636e\u7684\u521b\u5efa\u65f6\u95f4\u6216\u6700\u540e\u66f4\u65b0\u65f6\u95f4\uff0c\u4ee5\u4fbf\u5bf9\u6570\u636e\u8fdb\u884c\u8ffd\u8e2a\u548c\u7ba1\u7406\u3002MySQL\u4e2d\u7684\u65f6\u95f4\u6233\u7c7b\u578b\u5177\u6709\u81ea\u52a8\u66f4\u65b0\u529f\u80fd\uff0c\u53ef\u4ee5\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6570\u636e\u65f6\u81ea\u52a8\u8bb0\u5f55\u5f53\u524d\u7684\u65f6\u95f4\u6233\u3002<\/p>\n

\u65f6\u95f4\u6233\u7684\u5b9a\u4e49<\/strong><\/p>\n

\u5728MySQL\u4e2d\uff0c\u65f6\u95f4\u6233\u7684\u5b9a\u4e49\u683c\u5f0f\u4e3aTIMESTAMP<\/code>\uff0c\u53ef\u4ee5\u5177\u6709\u53ef\u9009\u7684\u53c2\u6570\uff0c\u5982\u9ed8\u8ba4\u503c\u3001\u81ea\u52a8\u66f4\u65b0\u7b49\u3002\u65f6\u95f4\u6233\u7684\u6570\u636e\u8303\u56f4\u662f\u4ece1970\u5e741\u67081\u65e500:00:01\u52302038\u5e74\u67d0\u4e2a\u65f6\u95f4\u70b9\uff0c\u7cbe\u786e\u5230\u79d2\u7ea7\u3002\u5982\u679c\u9700\u8981\u66f4\u5927\u7684\u65f6\u95f4\u8303\u56f4\uff0c\u53ef\u4ee5\u4f7f\u7528DATETIME<\/code>\u7c7b\u578b\u3002<\/p>\n

\u65f6\u95f4\u6233\u7684\u4f7f\u7528\u65b9\u6cd5<\/strong><\/p>\n

    \n
  1. \u521b\u5efa\u8868\u65f6\u5b9a\u4e49\u65f6\u95f4\u6233\u5b57\u6bb5<\/li>\n<\/ol>\n

    \u5728\u521b\u5efa\u8868\u65f6\uff0c\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u65f6\u95f4\u6233\u5b57\u6bb5\uff0c\u5e76\u4e3a\u5176\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u4e3a\u5f53\u524d\u65f6\u95f4\uff0c\u4ee5\u4fbf\u5728\u63d2\u5165\u65b0\u6570\u636e\u65f6\u81ea\u52a8\u8bb0\u5f55\u5f53\u524d\u65f6\u95f4\u6233\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n

    CREATE TABLE example_table (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(50),\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/pre>\n
    \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3aexample_table<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3acreated_at<\/code>\u7684\u65f6\u95f4\u6233\u5b57\u6bb5\u3002<\/p>\n
      \n
    1. \u63d2\u5165\u6570\u636e\u65f6\u81ea\u52a8\u751f\u6210\u65f6\u95f4\u6233<\/li>\n<\/ol>\n
      \u5f53\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4e0d\u7528\u6307\u5b9a\u65f6\u95f4\u6233\u5b57\u6bb5\u7684\u503c\uff0cMySQL\u4f1a\u81ea\u52a8\u4f7f\u7528\u5f53\u524d\u65f6\u95f4\u6233\u586b\u5145\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
      INSERT INTO example_table (name) VALUES ('John');<\/pre>\n
      \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u5411example_table<\/code>\u8868\u4e2d\u63d2\u5165\u4e86\u4e00\u6761\u8bb0\u5f55\uff0ccreated_at<\/code>\u5b57\u6bb5\u4f1a\u81ea\u52a8\u586b\u5145\u4e3a\u5f53\u524d\u65f6\u95f4\u3002<\/p>\n
        \n
      1. \u66f4\u65b0\u6570\u636e\u65f6\u81ea\u52a8\u66f4\u65b0\u65f6\u95f4\u6233<\/li>\n<\/ol>\n
        \u5982\u679c\u9700\u8981\u5728\u66f4\u65b0\u6570\u636e\u65f6\u66f4\u65b0\u65f6\u95f4\u6233\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4e3a\u65f6\u95f4\u6233\u5b57\u6bb5\u8bbe\u7f6eON UPDATE CURRENT_TIMESTAMP<\/code>\u5c5e\u6027\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
        ALTER TABLE example_table MODIFY created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;<\/pre>\n
        \u8fd9\u6837\uff0c\u5f53\u66f4\u65b0example_table<\/code>\u8868\u4e2d\u7684\u6570\u636e\u65f6\uff0ccreated_at<\/code>\u5b57\u6bb5\u4f1a\u81ea\u52a8\u66f4\u65b0\u4e3a\u5f53\u524d\u65f6\u95f4\u6233\u3002<\/p>\n
          \n
        1. \u67e5\u8be2\u6570\u636e\u65f6\u4f7f\u7528\u65f6\u95f4\u6233<\/li>\n<\/ol>\n
          \u5728\u67e5\u8be2\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u65f6\u95f4\u6233\u5b57\u6bb5\u8fdb\u884c\u6761\u4ef6\u7b5b\u9009\u6216\u6392\u5e8f\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
          SELECT * FROM example_table WHERE created_at > '2022-01-01';<\/pre>\n
          \u8fd9\u6761\u67e5\u8be2\u4f1a\u8fd4\u56decreated_at<\/code>\u5b57\u6bb5\u503c\u57282022\u5e741\u67081\u65e5\u4e4b\u540e\u7684\u8bb0\u5f55\u3002<\/p>\n
          \u7efc\u4e0a\u6240\u8ff0\uff0cMySQL\u65f6\u95f4\u6233\u662f\u4e00\u79cd\u65b9\u4fbf\u8bb0\u5f55\u65f6\u95f4\u4fe1\u606f\u7684\u6570\u636e\u7c7b\u578b\uff0c\u901a\u8fc7\u5408\u9002\u7684\u5b9a\u4e49\u548c\u8bbe\u7f6e\uff0c\u53ef\u4ee5\u5b9e\u73b0\u81ea\u52a8\u751f\u6210\u548c\u81ea\u52a8\u66f4\u65b0\u65f6\u95f4\u6233\u7684\u529f\u80fd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u65f6\u95f4\u6233\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u5730\u8ffd\u8e2a\u6570\u636e\u7684\u53d8\u5316\u548c\u64cd\u4f5c\u65f6\u95f4\uff0c\u63d0\u9ad8\u6570\u636e\u7ba1\u7406\u7684\u6548\u7387\u548c\u51c6\u786e\u6027\u3002<\/p>\n
          \u4ee5\u4e0a\u5c31\u662f\u300a\u6df1\u5165\u63a2\u8ba8MySQL\u4e2d\u65f6\u95f4\u6233\u7684\u5b9a\u4e49\u548c\u7528\u6cd5\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8emysql,\u65f6\u95f4\u6233,\u4f7f\u7528\u65b9\u6cd5\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
          \n
          \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          \u6df1\u5165\u63a2\u8ba8MySQL\u4e2d\u65f6\u95f4\u6233\u7684\u5b9a\u4e49...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200097","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200097","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200097"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200097\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}