{"id":461,"date":"2024-12-22T14:01:17","date_gmt":"2024-12-22T06:01:17","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=461"},"modified":"2024-12-22T14:01:17","modified_gmt":"2024-12-22T06:01:17","slug":"now%ef%bc%88%ef%bc%89%e5%92%8ccurrent_date%ef%bc%88%ef%bc%89%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2024\/12\/22\/now%ef%bc%88%ef%bc%89%e5%92%8ccurrent_date%ef%bc%88%ef%bc%89%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f\/","title":{"rendered":"NOW\uff08\uff09\u548cCURRENT_DATE\uff08\uff09\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"\n
\n

\u5728 MySQL \u4e2d\uff0cNOW()<\/code> \u548c CURRENT_DATE()<\/code> \u90fd\u7528\u4e8e\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff0c\u4f46\u5b83\u4eec\u6709\u4e00\u4e9b \u91cd\u8981\u7684\u533a\u522b<\/strong>\uff0c\u5c24\u5176\u662f\u5728\u8fd4\u56de\u7ed3\u679c\u7684\u7cbe\u5ea6\u548c\u7528\u9014\u4e0a\u3002\u7406\u89e3\u8fd9\u4e9b\u5dee\u5f02\u4e0d\u4ec5\u6709\u52a9\u4e8e\u4f60\u6b63\u786e\u5730\u9009\u62e9\u51fd\u6570\uff0c\u8fd8\u80fd\u5728\u9762\u8bd5\u4e2d\u5c55\u793a\u4f60\u5bf9 MySQL \u51fd\u6570\u7684\u7406\u89e3\u3002<\/p>\n<\/blockquote>\n\n\n\n

1. NOW() \u548c CURRENT_DATE() \u7684\u533a\u522b<\/strong><\/h3>\n\n\n\n

1.1 NOW()<\/strong><\/h4>\n\n\n\n
    \n
  • \u529f\u80fd<\/strong>\uff1aNOW()<\/code> \u8fd4\u56de\u5f53\u524d\u7684 \u65e5\u671f\u548c\u65f6\u95f4<\/strong>\uff08\u5373 YYYY-MM-DD HH:MM:SS<\/code> \u683c\u5f0f\uff09\u3002<\/li>\n\n\n\n
  • \u7cbe\u5ea6<\/strong>\uff1a\u5305\u542b\u65f6\u3001\u5206\u3001\u79d2\u3002<\/li>\n\n\n\n
  • \u8fd4\u56de\u7c7b\u578b<\/strong>\uff1aDATETIME<\/code> \u7c7b\u578b\u3002<\/li>\n\n\n\n
  • \u7528\u9014<\/strong>\uff1a\u5e38\u7528\u4e8e\u9700\u8981\u540c\u65f6\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u7684\u573a\u666f\uff0c\u6bd4\u5982\u8bb0\u5f55\u64cd\u4f5c\u7684\u65f6\u95f4\u6233\u3001\u63d2\u5165\u5f53\u524d\u65f6\u95f4\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n

    \u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n

    SELECT NOW();<\/code><\/pre>\n\n\n\n
    \u8fd4\u56de\uff1a<\/p>\n\n\n\n
    2024-12-22 15:30:45<\/code><\/pre>\n\n\n\n
    1.2 CURRENT_DATE()<\/strong><\/h4>\n\n\n\n
      \n
    • \u529f\u80fd<\/strong>\uff1aCURRENT_DATE()<\/code> \u8fd4\u56de\u5f53\u524d\u7684 \u65e5\u671f<\/strong>\uff08\u5373 YYYY-MM-DD<\/code> \u683c\u5f0f\uff09\u3002<\/li>\n\n\n\n
    • \u7cbe\u5ea6<\/strong>\uff1a\u4ec5\u5305\u542b\u65e5\u671f\uff0c\u4e0d\u5305\u542b\u65f6\u3001\u5206\u3001\u79d2\u3002<\/li>\n\n\n\n
    • \u8fd4\u56de\u7c7b\u578b<\/strong>\uff1aDATE<\/code> \u7c7b\u578b\u3002<\/li>\n\n\n\n
    • \u7528\u9014<\/strong>\uff1a\u5e38\u7528\u4e8e\u53ea\u9700\u8981\u65e5\u671f\u90e8\u5206\u7684\u573a\u666f\uff0c\u5982\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u3001\u6bd4\u8f83\u65e5\u671f\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n
      \u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n
      SELECT CURRENT_DATE();<\/code><\/pre>\n\n\n\n
      \u8fd4\u56de\uff1a<\/p>\n\n\n\n
      2024-12-22<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      2. \u5173\u952e\u533a\u522b\u603b\u7ed3<\/strong><\/h3>\n\n\n\n
      \u7279\u6027<\/th>NOW()<\/strong><\/th>CURRENT_DATE()<\/strong><\/th><\/tr><\/thead>
      \u8fd4\u56de\u5185\u5bb9<\/strong><\/td>\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4 (YYYY-MM-DD HH:MM:SS<\/code>)<\/td>\u5f53\u524d\u7684\u65e5\u671f (YYYY-MM-DD<\/code>)<\/td><\/tr>
      \u8fd4\u56de\u7c7b\u578b<\/strong><\/td>DATETIME<\/code> \u7c7b\u578b<\/td>DATE<\/code> \u7c7b\u578b<\/td><\/tr>
      \u7cbe\u5ea6<\/strong><\/td>\u5305\u62ec\u65f6\u3001\u5206\u3001\u79d2<\/td>\u4ec5\u5305\u542b\u65e5\u671f\u90e8\u5206<\/td><\/tr>
      \u7528\u9014<\/strong><\/td>\u9002\u7528\u4e8e\u83b7\u53d6\u65f6\u95f4\u6233\uff0c\u8bb0\u5f55\u4e8b\u4ef6\u7684\u7cbe\u786e\u65f6\u95f4<\/td>\u9002\u7528\u4e8e\u53ea\u5173\u5fc3\u65e5\u671f\u7684\u573a\u666f\uff0c\u5982\u6bd4\u8f83\u65e5\u671f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      \n\n\n\n
      3. \u9762\u8bd5\u4e2d\u5982\u4f55\u56de\u7b54<\/strong><\/h3>\n\n\n\n
      3.1 \u57fa\u672c\u56de\u7b54<\/strong><\/h4>\n\n\n\n
      \u4f60\u53ef\u4ee5\u7b80\u6d01\u5730\u56de\u7b54\uff1a<\/p>\n\n\n\n
        \n
      • NOW()<\/code> \u8fd4\u56de\u5f53\u524d\u7684 \u65e5\u671f\u548c\u65f6\u95f4<\/strong>\uff0c\u5373\u5305\u62ec\u5e74\u3001\u6708\u3001\u65e5\u3001\u5c0f\u65f6\u3001\u5206\u949f\u548c\u79d2\u3002<\/li>\n\n\n\n
      • CURRENT_DATE()<\/code> \u53ea\u8fd4\u56de\u5f53\u524d\u7684 \u65e5\u671f<\/strong>\uff0c\u5373\u4ec5\u5305\u542b\u5e74\u3001\u6708\u3001\u65e5\uff0c\u4e0d\u5305\u542b\u5177\u4f53\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n
        3.2 \u4e3e\u4f8b\u8bf4\u660e<\/strong><\/h4>\n\n\n\n
        \u5982\u679c\u9762\u8bd5\u5b98\u8981\u6c42\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
          \n
        • \u5047\u8bbe\u4f60\u8981\u5728\u6570\u636e\u8868\u4e2d\u63d2\u5165\u5f53\u524d\u7684\u65f6\u95f4\u6233\uff0c\u53ef\u4ee5\u4f7f\u7528 NOW()<\/code>\uff1a<\/li>\n<\/ul>\n\n\n\n
            INSERT INTO orders (order_date) VALUES (NOW());<\/code><\/pre>\n\n\n\n
          \u8fd9\u4f1a\u5c06 \u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4<\/strong> \u63d2\u5165\u5230 order_date<\/code> \u5b57\u6bb5\u4e2d\u3002<\/p>\n\n\n\n
            \n
          • \u5982\u679c\u4f60\u53ea\u9700\u8981\u63d2\u5165\u5f53\u524d\u7684\u65e5\u671f\uff08\u6bd4\u5982\u8868\u793a\u67d0\u4e2a\u4e8b\u4ef6\u7684\u65e5\u671f\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528 CURRENT_DATE()<\/code>\uff1a<\/li>\n<\/ul>\n\n\n\n
              INSERT INTO events (event_date) VALUES (CURRENT_DATE());<\/code><\/pre>\n\n\n\n
            \u8fd9\u4f1a\u5c06 \u5f53\u524d\u7684\u65e5\u671f<\/strong> \u63d2\u5165\u5230 event_date<\/code> \u5b57\u6bb5\u4e2d\u3002<\/p>\n\n\n\n
            3.3 \u66f4\u591a\u7ec6\u8282<\/strong><\/h4>\n\n\n\n
            \u4f60\u8fd8\u53ef\u4ee5\u63d0\u5230\uff1a<\/p>\n\n\n\n
              \n
            • NOW()<\/code> \u4f1a\u8fd4\u56de \u65e5\u671f\u548c\u65f6\u95f4<\/strong>\uff0c\u901a\u5e38\u7528\u4e8e \u4e8b\u52a1\u65f6\u95f4\u6233\u3001\u8bb0\u5f55\u65e5\u5fd7\u3001\u65f6\u95f4\u8ba1\u7b97\u7b49<\/strong>\u3002<\/li>\n\n\n\n
            • CURRENT_DATE()<\/code> \u5e38\u7528\u4e8e \u65e5\u671f\u8303\u56f4\u7684\u6bd4\u8f83\u3001\u751f\u6210\u62a5\u544a\u3001\u7edf\u8ba1\u65e5\u671f\u76f8\u5173\u7684\u6570\u636e\u7b49<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n
              3.4 \u6ce8\u610f\u4e8b\u9879<\/strong><\/h4>\n\n\n\n
                \n
              • CURRENT_DATE()<\/code> \u4e5f\u53ef\u4ee5\u4f5c\u4e3a CURRENT_DATE<\/code> \u7684\u7b80\u5199\u5f62\u5f0f\uff0c\u800c NOW()<\/code> \u53ea\u80fd\u7528\u4f5c NOW()<\/code>\uff0c\u4e0d\u4f1a\u7b80\u5199\u6210 CURRENT_TIME<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                4. \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                  \n
                • NOW()<\/code><\/strong> \u8fd4\u56de\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4\uff08DATETIME<\/code> \u7c7b\u578b\uff09\u3002<\/li>\n\n\n\n
                • CURRENT_DATE()<\/code><\/strong> \u8fd4\u56de\u5f53\u524d\u7684\u65e5\u671f\uff08DATE<\/code> \u7c7b\u578b\uff09\uff0c\u4e0d\u5305\u542b\u65f6\u95f4\u90e8\u5206\u3002<\/li>\n<\/ul>\n\n\n\n
                  \u5728\u9762\u8bd5\u4e2d\uff0c\u5c55\u793a\u4f60\u5bf9\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u7406\u89e3\uff0c\u5e76\u901a\u8fc7\u5b9e\u9645\u4f8b\u5b50\u8bf4\u660e\u5b83\u4eec\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u4f7f\u7528\uff0c\u5c06\u4f1a\u8ba9\u4f60\u7ed9\u9762\u8bd5\u5b98\u7559\u4e0b\u6df1\u523b\u7684\u5370\u8c61\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                  \u5728 MySQL \u4e2d\uff0cNOW() \u548c CURRENT_DATE() \u90fd\u7528\u4e8e\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff0c\u4f46\u5b83\u4eec\u6709\u4e00\u4e9b \u91cd\u8981 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-461","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/461","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=461"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/461\/revisions"}],"predecessor-version":[{"id":462,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/461\/revisions\/462"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}