{"id":177155,"date":"2024-11-08T13:48:18","date_gmt":"2024-11-08T05:48:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177155\/"},"modified":"2024-11-08T13:48:19","modified_gmt":"2024-11-08T05:48:19","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41067-sql%e7%8b%80%e6%85%8b%ef%bc%9a42000%ef%bc%88er_invalid_default%ef%bc%89%e5%b0%8d%ef%bc%85s%e7%9a%84%e7%84%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177155\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41067 &#8211; SQL\u72c0\u614b\uff1a42000\uff08ER_INVALID_DEFAULT\uff09\u5c0d\u201c\uff05s\u201d\u7684\u7121\u6548\u9ed8\u8a8d\u503c"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41067-sql%e7%8b%80%e6%85%8b%ef%bc%9a42000%ef%bc%88er_invalid_default%ef%bc%89%e5%b0%8d%ef%bc%85s%e7%9a%84%e7%84%a1-FHYlEpsFQZ\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41067 &#8211; SQL\u72c0\u614b\uff1a42000\uff08ER_INVALID_DEFAULT\uff09\u5c0d\u201c\uff05s\u201d\u7684\u7121\u6548\u9ed8\u8a8d\u503c<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa41067\uff0c\u8a72\u932f\u8aa4\u7684SQL\u72c0\u614b\u70ba42000\uff0c\u8868\u793a\u5c0d\u67d0\u500b\u5b57\u6bb5\u7684\u7121\u6548\u9ed8\u8a8d\u503c\u3002\u9019\u500b\u554f\u984c\u901a\u5e38\u767c\u751f\u5728\u5275\u5efa\u6216\u4fee\u6539\u8868\u6642\uff0c\u5c24\u5176\u662f\u7576\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u8207\u5176\u9ed8\u8a8d\u503c\u4e0d\u5339\u914d\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-FHYlEpsFQZ\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u932f\u8aa41067\u7684\u4e3b\u8981\u539f\u56e0\u662f\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u4e0d\u7b26\u5408\u5176\u6578\u64da\u985e\u578b\u7684\u8981\u6c42\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u6574\u6578\u985e\u578b\u7684\u5b57\u6bb5\uff0c\u5982\u679c\u8a2d\u7f6e\u4e86\u5b57\u7b26\u4e32\u4f5c\u70ba\u9ed8\u8a8d\u503c\uff0c\u5247\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u65e5\u671f\u683c\u5f0f\u932f\u8aa4\uff1a<\/strong>\u5982\u679c\u5b57\u6bb5\u985e\u578b\u70baDATE\u6216DATETIME\uff0c\u4f46\u9ed8\u8a8d\u503c\u537b\u4e0d\u662f\u6709\u6548\u7684\u65e5\u671f\u683c\u5f0f\uff0c\u5247\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>NULL\u503c\u554f\u984c\uff1a<\/strong>\u5982\u679c\u5b57\u6bb5\u4e0d\u5141\u8a31NULL\u503c\uff0c\u4f46\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70baNULL\uff0c\u5247\u6703\u51fa\u73fe\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a41067-FHYlEpsFQZ\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41067<\/h2>\n<p>\u4fee\u5fa9MySQL\u932f\u8aa41067\u7684\u65b9\u6cd5\u4e3b\u8981\u662f\u78ba\u4fdd\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8207\u5176\u6578\u64da\u985e\u578b\u76f8\u7b26\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e8%a1%a8%e7%b5%90%e6%a7%8b-FHYlEpsFQZ\">1. \u6aa2\u67e5\u8868\u7d50\u69cb<\/h3>\n<pre><code>SHOW CREATE TABLE your_table_name;<\/code><\/pre>\n<p>\u4f7f\u7528\u4e0a\u8ff0\u547d\u4ee4\u67e5\u770b\u8868\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u6bcf\u500b\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u548c\u9ed8\u8a8d\u503c\u90fd\u662f\u6b63\u78ba\u7684\u3002<\/p>\n<h3 id=\"2-%e4%bf%ae%e6%94%b9%e9%bb%98%e8%aa%8d%e5%80%bc-FHYlEpsFQZ\">2. \u4fee\u6539\u9ed8\u8a8d\u503c<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u67d0\u500b\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u4e0d\u6b63\u78ba\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u4fee\u6539\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nMODIFY your_column_name INT DEFAULT 0;<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u5c07your_column_name\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba0\uff0c\u78ba\u4fdd\u5176\u8207\u6574\u6578\u985e\u578b\u76f8\u7b26\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5null%e7%b4%84%e6%9d%9f-FHYlEpsFQZ\">3. \u6aa2\u67e5NULL\u7d04\u675f<\/h3>\n<p>\u5982\u679c\u5b57\u6bb5\u4e0d\u5141\u8a31NULL\u503c\uff0c\u5247\u9700\u8981\u78ba\u4fdd\u9ed8\u8a8d\u503c\u4e0d\u662fNULL\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nMODIFY your_column_name VARCHAR(255) NOT NULL DEFAULT '';<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5c07your_column_name\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u4e26\u4e14\u4e0d\u5141\u8a31NULL\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-FHYlEpsFQZ\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70bausers\u7684\u8868\uff0c\u5176\u4e2d\u6709\u4e00\u500bcreated_at\u5b57\u6bb5\uff0c\u5176\u985e\u578b\u70baDATETIME\u3002\u5982\u679c\u6211\u5011\u5617\u8a66\u5c07\u5176\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba\u4e00\u500b\u7121\u6548\u7684\u5b57\u7b26\u4e32\uff0c\u5247\u6703\u51fa\u73fe\u932f\u8aa41067\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    created_at DATETIME DEFAULT 'invalid_date'\n);<\/code><\/pre>\n<p>\u8981\u4fee\u5fa9\u9019\u500b\u554f\u984c\uff0c\u6211\u5011\u61c9\u8a72\u5c07\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba\u7576\u524d\u6642\u9593\uff1a<\/p>\n<pre><code>ALTER TABLE users \nMODIFY created_at DATETIME DEFAULT CURRENT_TIMESTAMP;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FHYlEpsFQZ\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41067\u901a\u5e38\u662f\u7531\u65bc\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8207\u5176\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u8868\u7d50\u69cb\u3001\u4fee\u6539\u9ed8\u8a8d\u503c\u4ee5\u53ca\u78ba\u4fddNULL\u7d04\u675f\u7684\u6b63\u78ba\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u904b\u884c\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u53ca\u6642\u4fee\u5fa9\u9019\u985e\u932f\u8aa4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41067\uff0c\u89e3\u6c7aSQL\u72c0\u614b42000\uff08ER_INVALID_DEFAULT\uff09\u5c0e\u81f4\u7684\u7121\u6548\u9ed8\u8a8d\u503c\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u6b63\u5e38\u904b\u884c\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-177155","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177155","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=177155"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177155\/revisions"}],"predecessor-version":[{"id":177156,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177155\/revisions\/177156"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}