{"id":177117,"date":"2024-11-08T13:29:24","date_gmt":"2024-11-08T05:29:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177117\/"},"modified":"2024-11-08T13:29:25","modified_gmt":"2024-11-08T05:29:25","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41048-sql%e7%8b%80%e6%85%8b%ef%bc%9a23000%ef%bc%88er_bad_null_error%ef%bc%89%e5%88%97%ef%bc%85s%e4%b8%8d%e8%83%bd%e7%82%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177117\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41048 &#8211; SQL\u72c0\u614b\uff1a23000\uff08ER_BAD_NULL_ERROR\uff09\u5217\u201c\uff05s\u201d\u4e0d\u80fd\u70ba\u7a7a"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41048-sql%e7%8b%80%e6%85%8b%ef%bc%9a23000%ef%bc%88er_bad_null_error%ef%bc%89%e5%88%97%ef%bc%85s%e4%b8%8d%e8%83%bd%e7%82%ba-kzqYaTOSPQ\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41048 &#8211; SQL\u72c0\u614b\uff1a23000\uff08ER_BAD_NULL_ERROR\uff09\u5217\u201c\uff05s\u201d\u4e0d\u80fd\u70ba\u7a7a<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa41048\uff0c\u8a72\u932f\u8aa4\u7684SQL\u72c0\u614b\u70ba23000\uff0c\u8868\u793a\u67d0\u500b\u5217\u4e0d\u80fd\u70ba\u7a7a\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6642\uff0c\u7576\u8a66\u5716\u5c07NULL\u503c\u63d2\u5165\u5230\u4e00\u500b\u4e0d\u5141\u8a31\u70baNULL\u7684\u5217\u4e2d\u6642\uff0c\u5c31\u6703\u51fa\u73fe\u9019\u500b\u932f\u8aa4\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-kzqYaTOSPQ\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u932f\u8aa41048\u7684\u4e3b\u8981\u539f\u56e0\u662f\u6578\u64da\u5eab\u8868\u4e2d\u7684\u67d0\u500b\u5217\u88ab\u5b9a\u7fa9\u70baNOT NULL\uff0c\u4f46\u5728\u57f7\u884cINSERT\u6216UPDATE\u64cd\u4f5c\u6642\uff0c\u537b\u8a66\u5716\u5c07NULL\u503c\u63d2\u5165\u8a72\u5217\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u672a\u63d0\u4f9b\u5fc5\u8981\u7684\u6578\u64da\uff1a<\/strong>\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u672a\u63d0\u4f9b\u8a72\u5217\u7684\u503c\u3002<\/li>\n<li><strong>\u932f\u8aa4\u7684SQL\u8a9e\u53e5\uff1a<\/strong>SQL\u8a9e\u53e5\u4e2d\u53ef\u80fd\u5b58\u5728\u8a9e\u6cd5\u932f\u8aa4\uff0c\u5c0e\u81f4\u67d0\u4e9b\u503c\u672a\u88ab\u6b63\u78ba\u50b3\u905e\u3002<\/li>\n<li><strong>\u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u932f\u8aa4\uff1a<\/strong>\u61c9\u7528\u7a0b\u5e8f\u5728\u8655\u7406\u6578\u64da\u6642\uff0c\u53ef\u80fd\u672a\u80fd\u6b63\u78ba\u7372\u53d6\u6216\u50b3\u905e\u6240\u9700\u7684\u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a41048-kzqYaTOSPQ\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41048<\/h2>\n<p>\u4fee\u5fa9MySQL\u932f\u8aa41048\u7684\u65b9\u6cd5\u53d6\u6c7a\u65bc\u5177\u9ad4\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5sql%e8%aa%9e%e5%8f%a5-kzqYaTOSPQ\">1. \u6aa2\u67e5SQL\u8a9e\u53e5<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u5f15\u767c\u932f\u8aa4\u7684SQL\u8a9e\u53e5\u3002\u78ba\u4fdd\u6240\u6709\u5fc5\u9700\u7684\u5217\u90fd\u5df2\u6b63\u78ba\u63d0\u4f9b\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>INSERT INTO users (username, email) VALUES ('testuser', NULL);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5982\u679cemail\u5217\u88ab\u5b9a\u7fa9\u70baNOT NULL\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa4\u3002\u61c9\u8a72\u63d0\u4f9b\u4e00\u500b\u6709\u6548\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff1a<\/p>\n<pre><code>INSERT INTO users (username, email) VALUES ('testuser', 'test@example.com');<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%b5%90%e6%a7%8b-kzqYaTOSPQ\">2. \u6aa2\u67e5\u6578\u64da\u5eab\u8868\u7d50\u69cb<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u8868\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u6240\u6709\u5217\u7684\u5b9a\u7fa9\u7b26\u5408\u9810\u671f\uff1a<\/p>\n<pre><code>DESCRIBE users;<\/code><\/pre>\n<p>\u5982\u679c\u67d0\u500b\u5217\u4e0d\u61c9\u8a72\u70baNULL\uff0c\u5247\u61c9\u78ba\u4fdd\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6642\u63d0\u4f9b\u76f8\u61c9\u7684\u503c\u3002<\/p>\n<h3 id=\"3-%e6%87%89%e7%94%a8%e7%a8%8b%e5%ba%8f%e9%82%8f%e8%bc%af%e6%aa%a2%e6%9f%a5-kzqYaTOSPQ\">3. \u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u6aa2\u67e5<\/h3>\n<p>\u5982\u679cSQL\u8a9e\u53e5\u6b63\u78ba\uff0c\u4f46\u4ecd\u7136\u51fa\u73fe\u932f\u8aa4\uff0c\u5247\u53ef\u80fd\u662f\u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u5b58\u5728\u554f\u984c\u3002\u6aa2\u67e5\u61c9\u7528\u7a0b\u5e8f\u4ee3\u78bc\uff0c\u78ba\u4fdd\u5728\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u4e4b\u524d\uff0c\u6240\u6709\u5fc5\u8981\u7684\u6578\u64da\u90fd\u5df2\u6b63\u78ba\u7372\u53d6\u4e26\u50b3\u905e\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>if (empty($email)) {\n    $email = 'default@example.com'; \/\/ \u63d0\u4f9b\u4e00\u500b\u9ed8\u8a8d\u503c\n}<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e9%bb%98%e8%aa%8d%e5%80%bc-kzqYaTOSPQ\">4. \u4f7f\u7528\u9ed8\u8a8d\u503c<\/h3>\n<p>\u5982\u679c\u67d0\u500b\u5217\u53ef\u4ee5\u63a5\u53d7\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u5728\u5275\u5efa\u8868\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u9019\u6a23\u5728\u672a\u63d0\u4f9b\u8a72\u5217\u7684\u503c\u6642\uff0c\u6578\u64da\u5eab\u6703\u81ea\u52d5\u4f7f\u7528\u9ed8\u8a8d\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL DEFAULT 'default@example.com'\n);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kzqYaTOSPQ\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41048\uff08ER_BAD_NULL_ERROR\uff09\u901a\u5e38\u662f\u7531\u65bc\u8a66\u5716\u5c07NULL\u503c\u63d2\u5165\u5230\u4e0d\u5141\u8a31\u70baNULL\u7684\u5217\u4e2d\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5SQL\u8a9e\u53e5\u3001\u6578\u64da\u5eab\u8868\u7d50\u69cb\u3001\u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u4ee5\u53ca\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41048\uff08ER_BAD_NULL_ERROR\uff09\u7684\u65b9\u6cd5\uff0c\u89e3\u6c7a\u5217\u201c%s\u201d\u4e0d\u80fd\u70ba\u7a7a\u7684\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\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-177117","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177117","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=177117"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177117\/revisions"}],"predecessor-version":[{"id":177118,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177117\/revisions\/177118"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}