{"id":177501,"date":"2024-11-08T14:40:22","date_gmt":"2024-11-08T06:40:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177501\/"},"modified":"2024-11-08T14:40:23","modified_gmt":"2024-11-08T06:40:23","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41121-sqlstate-42000%ef%bc%88er_null_column_in_index%ef%bc%89%e5%88%97s%e7%94%a8%e6%96%bcunique%e6%88%96index%e4%bd%86%e6%9c%aa","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177501\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41121 &#8211; SQLSTATE: 42000\uff08ER_NULL_COLUMN_IN_INDEX\uff09\u5217&#8217;%s&#8217;\u7528\u65bcUNIQUE\u6216INDEX\u4f46\u672a\u5b9a\u7fa9\u70baNOT NULL"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41121-sqlstate-42000%ef%bc%88er_null_column_in_index%ef%bc%89-dNBIRJovTR\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41121 &#8211; SQLSTATE: 42000\uff08ER_NULL_COLUMN_IN_INDEX\uff09<\/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\u662f\u932f\u8aa41121\uff0c\u8a72\u932f\u8aa4\u7684\u5177\u9ad4\u4fe1\u606f\u70ba\u201c\u5217&#8217;%s&#8217;\u7528\u65bcUNIQUE\u6216INDEX\u4f46\u672a\u5b9a\u7fa9\u70baNOT NULL\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u5275\u5efa\u7d22\u5f15\u6216\u552f\u4e00\u7d04\u675f\u6642\uff0c\u7576\u67d0\u4e00\u5217\u88ab\u8a2d\u7f6e\u70baNULL\u6642\uff0cMySQL\u7121\u6cd5\u78ba\u4fdd\u8a72\u5217\u7684\u552f\u4e00\u6027\uff0c\u5f9e\u800c\u5c0e\u81f4\u932f\u8aa4\u7684\u7522\u751f\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-dNBIRJovTR\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u4e2d\u7684UNIQUE\u7d04\u675f\u8981\u6c42\u8a72\u5217\u7684\u6bcf\u500b\u503c\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u9019\u610f\u5473\u8457\u4e0d\u80fd\u6709\u91cd\u8907\u7684\u503c\u3002\u7136\u800c\uff0cNULL\u503c\u5728SQL\u4e2d\u88ab\u8996\u70ba\u201c\u672a\u77e5\u201d\uff0c\u56e0\u6b64\u591a\u500bNULL\u503c\u88ab\u8996\u70ba\u76f8\u7b49\u3002\u9019\u5c31\u5c0e\u81f4\u4e86\u5728\u5275\u5efa\u7d22\u5f15\u6642\uff0c\u5982\u679c\u8a72\u5217\u5141\u8a31NULL\u503c\uff0cMySQL\u7121\u6cd5\u78ba\u4fdd\u5176\u552f\u4e00\u6027\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa41121\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a41121-dNBIRJovTR\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa41121<\/h2>\n<p>\u4fee\u5fa9\u6b64\u932f\u8aa4\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n<h3 id=\"1-%e4%bf%ae%e6%94%b9%e5%88%97%e5%ae%9a%e7%be%a9-dNBIRJovTR\">1. \u4fee\u6539\u5217\u5b9a\u7fa9<\/h3>\n<p>\u6700\u76f4\u63a5\u7684\u89e3\u6c7a\u65b9\u6848\u662f\u5c07\u8a72\u5217\u7684\u5b9a\u7fa9\u4fee\u6539\u70baNOT NULL\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u8a72\u5217\u4e0d\u6703\u5305\u542bNULL\u503c\uff0c\u5f9e\u800c\u6eff\u8db3UNIQUE\u7d04\u675f\u7684\u8981\u6c42\u3002\u4ee5\u4e0b\u662f\u4fee\u6539\u5217\u5b9a\u7fa9\u7684SQL\u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name MODIFY your_column_name INT NOT NULL;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`your_table_name`\u662f\u4f60\u7684\u8868\u540d\uff0c`your_column_name`\u662f\u4f60\u8981\u4fee\u6539\u7684\u5217\u540d\uff0c`INT`\u662f\u8a72\u5217\u7684\u6578\u64da\u985e\u578b\u3002\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u8abf\u6574\u6578\u64da\u985e\u578b\u3002<\/p>\n<h3 id=\"2-%e7%a7%bb%e9%99%a4unique%e7%b4%84%e6%9d%9f-dNBIRJovTR\">2. \u79fb\u9664UNIQUE\u7d04\u675f<\/h3>\n<p>\u5982\u679c\u8a72\u5217\u4e0d\u9700\u8981\u4fdd\u6301\u552f\u4e00\u6027\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u79fb\u9664UNIQUE\u7d04\u675f\u3002\u9019\u6a23\u505a\u7684SQL\u8a9e\u53e5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name DROP INDEX your_index_name;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`your_index_name`\u662f\u4f60\u8981\u79fb\u9664\u7684\u7d22\u5f15\u540d\u7a31\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u932f\u8aa41121\u7684\u767c\u751f\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u9019\u6a23\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e5%85%b6%e4%bb%96%e5%88%97%e4%bd%9c%e7%82%ba%e7%b4%a2%e5%bc%95-dNBIRJovTR\">3. \u4f7f\u7528\u5176\u4ed6\u5217\u4f5c\u70ba\u7d22\u5f15<\/h3>\n<p>\u5982\u679c\u8a72\u5217\u4e0d\u9069\u5408\u7528\u4f5cUNIQUE\u7d22\u5f15\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u5176\u4ed6\u5217\u4f86\u5275\u5efa\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5c0d\u8a72\u5217\u7684\u7d04\u675f\uff0c\u540c\u6642\u4fdd\u6301\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE UNIQUE INDEX new_index_name ON your_table_name (another_column_name);<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`another_column_name`\u662f\u4f60\u9078\u64c7\u7684\u65b0\u5217\uff0c\u7528\u65bc\u5275\u5efa\u552f\u4e00\u7d22\u5f15\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dNBIRJovTR\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41121\u901a\u5e38\u662f\u7531\u65bc\u5217\u672a\u5b9a\u7fa9\u70baNOT NULL\u800c\u5c0e\u81f4\u7684UNIQUE\u6216INDEX\u7d04\u675f\u554f\u984c\u3002\u901a\u904e\u4fee\u6539\u5217\u5b9a\u7fa9\u3001\u79fb\u9664UNIQUE\u7d04\u675f\u6216\u4f7f\u7528\u5176\u4ed6\u5217\u4f5c\u70ba\u7d22\u5f15\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u4e86\u89e3\u9019\u4e9b\u89e3\u6c7a\u65b9\u6848\u5f8c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u8655\u7406\u6578\u64da\u5eab\u4e2d\u7684\u7d04\u675f\u554f\u984c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41121\u7684\u65b9\u6cd5\uff0c\u89e3\u91cb\u5982\u4f55\u8655\u7406\u672a\u5b9a\u7fa9\u70baNOT NULL\u7684\u5217\u5728UNIQUE\u6216INDEX\u4e2d\u7684\u554f\u984c\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-177501","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177501","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=177501"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177501\/revisions"}],"predecessor-version":[{"id":177502,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177501\/revisions\/177502"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}