{"id":177897,"date":"2024-11-08T16:28:26","date_gmt":"2024-11-08T08:28:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177897\/"},"modified":"2024-11-08T16:28:27","modified_gmt":"2024-11-08T08:28:27","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41230-sqlstate-42000-er_no_default-%e8%ae%8a%e9%87%8fs%e6%b2%92%e6%9c%89%e9%bb%98%e8%aa%8d%e5%80%bc","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177897\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41230 &#8211; SQLSTATE: 42000 (ER_NO_DEFAULT) \u8b8a\u91cf&#8217;%s&#8217;\u6c92\u6709\u9ed8\u8a8d\u503c"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41230-sqlstate-42000-er_no_default-%e8%ae%8a%e9%87%8fs%e6%b2%92%e6%9c%89%e9%bb%98%e8%aa%8d%e5%80%bc-qMsBzmdpNw\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41230 &#8211; SQLSTATE: 42000 (ER_NO_DEFAULT) \u8b8a\u91cf&#8217;%s&#8217;\u6c92\u6709\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\u8aa4\u4ee3\u78bc1230\uff0c\u986f\u793a\u70ba\u201cSQLSTATE: 42000 (ER_NO_DEFAULT) \u8b8a\u91cf&#8217;%s&#8217;\u6c92\u6709\u9ed8\u8a8d\u503c\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u7576\u67d0\u500b\u5b57\u6bb5\u672a\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u4e14\u672a\u63d0\u4f9b\u503c\u6642\uff0cMySQL\u6703\u5831\u544a\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\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-qMsBzmdpNw\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u4e2d\u7684\u6bcf\u500b\u8868\u90fd\u6709\u5176\u7d50\u69cb\u5b9a\u7fa9\uff0c\u5305\u62ec\u5b57\u6bb5\u540d\u7a31\u3001\u6578\u64da\u985e\u578b\u53ca\u5176\u5c6c\u6027\u3002\u7576\u4f60\u5617\u8a66\u63d2\u5165\u6578\u64da\u6642\uff0c\u5982\u679c\u67d0\u500b\u5b57\u6bb5\u88ab\u5b9a\u7fa9\u70ba\u201cNOT NULL\u201d\u4e14\u6c92\u6709\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u5247\u5fc5\u9808\u5728\u63d2\u5165\u8a9e\u53e5\u4e2d\u63d0\u4f9b\u8a72\u5b57\u6bb5\u7684\u503c\u3002\u5982\u679c\u672a\u63d0\u4f9b\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa41230\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u8868\u7d50\u69cb\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,\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5b57\u6bb5\u201cusername\u201d\u548c\u201cemail\u201d\u90fd\u88ab\u8a2d\u7f6e\u70ba\u201cNOT NULL\u201d\uff0c\u4f46\u6c92\u6709\u9ed8\u8a8d\u503c\u3002\u5982\u679c\u4f60\u57f7\u884c\u4ee5\u4e0b\u63d2\u5165\u8a9e\u53e5\uff1a<\/p>\n<pre><code>INSERT INTO users (created_at) VALUES (NOW());<\/code><\/pre>\n<p>\u9019\u5c07\u5c0e\u81f4\u932f\u8aa41230\uff0c\u56e0\u70ba\u201cusername\u201d\u548c\u201cemail\u201d\u5b57\u6bb5\u6c92\u6709\u63d0\u4f9b\u503c\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-qMsBzmdpNw\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%8f%90%e4%be%9b%e6%89%80%e6%9c%89%e5%bf%85%e9%9c%80%e7%9a%84%e5%ad%97%e6%ae%b5%e5%80%bc-qMsBzmdpNw\">1. \u63d0\u4f9b\u6240\u6709\u5fc5\u9700\u7684\u5b57\u6bb5\u503c<\/h3>\n<p>\u6700\u76f4\u63a5\u7684\u89e3\u6c7a\u65b9\u6848\u662f\u78ba\u4fdd\u5728\u63d2\u5165\u6578\u64da\u6642\u63d0\u4f9b\u6240\u6709\u201cNOT NULL\u201d\u5b57\u6bb5\u7684\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>INSERT INTO users (username, email, created_at) VALUES ('john_doe', 'john@example.com', NOW());<\/code><\/pre>\n<h3 id=\"2-%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc-qMsBzmdpNw\">2. \u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h3>\n<p>\u5982\u679c\u67d0\u4e9b\u5b57\u6bb5\u7d93\u5e38\u4e0d\u9700\u8981\u63d0\u4f9b\u503c\uff0c\u53ef\u4ee5\u8003\u616e\u70ba\u9019\u4e9b\u5b57\u6bb5\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u3002\u9019\u6a23\uff0c\u5373\u4f7f\u5728\u63d2\u5165\u6642\u672a\u63d0\u4f9b\u9019\u4e9b\u5b57\u6bb5\u7684\u503c\uff0cMySQL\u4e5f\u6703\u4f7f\u7528\u9ed8\u8a8d\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY email VARCHAR(100) NOT NULL DEFAULT 'no-reply@example.com';<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u5373\u4f7f\u5728\u63d2\u5165\u6642\u4e0d\u63d0\u4f9b\u201cemail\u201d\u5b57\u6bb5\u7684\u503c\uff0cMySQL\u4e5f\u6703\u81ea\u52d5\u4f7f\u7528\u201cno-reply@example.com\u201d\u4f5c\u70ba\u9ed8\u8a8d\u503c\u3002<\/p>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e5%b1%ac%e6%80%a7-qMsBzmdpNw\">3. \u4fee\u6539\u5b57\u6bb5\u5c6c\u6027<\/h3>\n<p>\u5982\u679c\u67d0\u500b\u5b57\u6bb5\u4e0d\u9700\u8981\u5f37\u5236\u8981\u6c42\u63d0\u4f9b\u503c\uff0c\u53ef\u4ee5\u8003\u616e\u5c07\u5176\u5c6c\u6027\u66f4\u6539\u70ba\u5141\u8a31NULL\u503c\u3002\u9019\u6a23\uff0c\u7576\u63d2\u5165\u6578\u64da\u6642\uff0c\u5982\u679c\u672a\u63d0\u4f9b\u8a72\u5b57\u6bb5\u7684\u503c\uff0cMySQL\u5c07\u4e0d\u6703\u5831\u932f\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY email VARCHAR(100) NULL;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qMsBzmdpNw\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41230 &#8211; SQLSTATE: 42000 (ER_NO_DEFAULT) \u8b8a\u91cf&#8217;%s&#8217;\u6c92\u6709\u9ed8\u8a8d\u503c\u901a\u5e38\u662f\u7531\u65bc\u5728\u63d2\u5165\u6578\u64da\u6642\u672a\u63d0\u4f9b\u5fc5\u9700\u7684\u5b57\u6bb5\u503c\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u63d0\u4f9b\u6240\u6709\u5fc5\u9700\u7684\u5b57\u6bb5\u503c\u3001\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u6216\u4fee\u6539\u5b57\u6bb5\u5c6c\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u5728\u904b\u884c\u6642\u4e0d\u6703\u53d7\u5230\u6b64\u985e\u932f\u8aa4\u7684\u5f71\u97ff\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41230 (ER_NO_DEFAULT) \u7684\u65b9\u6cd5\uff0c\u89e3\u6c7a\u8b8a\u91cf&#8217;%s&#8217;\u7f3a\u5c11\u9ed8\u8a8d\u503c\u7684\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-177897","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177897","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=177897"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177897\/revisions"}],"predecessor-version":[{"id":177898,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177897\/revisions\/177898"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}