{"id":180186,"date":"2024-11-09T08:07:17","date_gmt":"2024-11-09T00:07:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180186\/"},"modified":"2024-11-09T08:07:18","modified_gmt":"2024-11-09T00:07:18","slug":"%e5%88%aa%e9%99%a4sql-server%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180186\/","title":{"rendered":"\u522a\u9664Sql Server\u552f\u4e00\u7d04\u675f"},"content":{"rendered":"<h1 id=\"%e5%88%aa%e9%99%a4sql-server%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-LSvjLYvrMK\">\u522a\u9664SQL Server\u552f\u4e00\u7d04\u675f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u552f\u4e00\u7d04\u675f\uff08Unique Constraint\uff09\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u7d04\u675f\u689d\u4ef6\uff0c\u7528\u65bc\u78ba\u4fdd\u8cc7\u6599\u8868\u4e2d\u7684\u67d0\u4e00\u5217\u6216\u67d0\u5e7e\u5217\u7684\u6578\u64da\u662f\u552f\u4e00\u7684\u3002\u9019\u610f\u5473\u8457\u5728\u8a72\u5217\u4e2d\u4e0d\u5141\u8a31\u6709\u91cd\u8907\u7684\u503c\u3002\u96d6\u7136\u552f\u4e00\u7d04\u675f\u5728\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u65b9\u9762\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u522a\u9664\u9019\u4e9b\u7d04\u675f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL Server\u4e2d\u522a\u9664\u552f\u4e00\u7d04\u675f\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-LSvjLYvrMK\">\u4ec0\u9ebc\u662f\u552f\u4e00\u7d04\u675f<\/h2>\n<p>\u552f\u4e00\u7d04\u675f\u662f\u4e00\u7a2e\u8cc7\u6599\u5eab\u7d04\u675f\uff0c\u7528\u65bc\u78ba\u4fdd\u67d0\u4e00\u5217\u6216\u591a\u5217\u7684\u6578\u64da\u4e0d\u6703\u91cd\u8907\u3002\u9019\u5c0d\u65bc\u9700\u8981\u552f\u4e00\u6a19\u8b58\u7684\u6578\u64da\uff08\u4f8b\u5982\u7528\u6236\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u7b49\uff09\u7279\u5225\u91cd\u8981\u3002\u7576\u60a8\u5728SQL Server\u4e2d\u5b9a\u7fa9\u552f\u4e00\u7d04\u675f\u6642\uff0c\u7cfb\u7d71\u6703\u81ea\u52d5\u6aa2\u67e5\u63d2\u5165\u6216\u66f4\u65b0\u64cd\u4f5c\uff0c\u4ee5\u78ba\u4fdd\u4e0d\u6703\u9055\u53cd\u9019\u4e00\u7d04\u675f\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%aa%e9%99%a4%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-LSvjLYvrMK\">\u70ba\u4ec0\u9ebc\u9700\u8981\u522a\u9664\u552f\u4e00\u7d04\u675f<\/h2>\n<p>\u522a\u9664\u552f\u4e00\u7d04\u675f\u7684\u539f\u56e0\u53ef\u80fd\u6709\u591a\u7a2e\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u6a21\u578b\u7684\u8b8a\u66f4\uff1a\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u8abf\u6574\u8cc7\u6599\u8868\u7684\u7d50\u69cb\u3002<\/li>\n<li>\u6578\u64da\u6e05\u7406\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u522a\u9664\u91cd\u8907\u7684\u6578\u64da\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u552f\u4e00\u7d04\u675f\u7684\u9055\u53cd\u3002<\/li>\n<li>\u6027\u80fd\u8003\u91cf\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u552f\u4e00\u7d04\u675f\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u8cc7\u6599\u8868\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%88%aa%e9%99%a4%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-LSvjLYvrMK\">\u5982\u4f55\u522a\u9664\u552f\u4e00\u7d04\u675f<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u522a\u9664\u552f\u4e00\u7d04\u675f\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d\nDROP CONSTRAINT \u7d04\u675f\u540d;<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u5177\u9ad4\u7684\u6b65\u9a5f\u548c\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-1%ef%bc%9a%e6%9f%a5%e6%89%be%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e5%90%8d%e7%a8%b1-LSvjLYvrMK\">\u6b65\u9a5f 1\uff1a\u67e5\u627e\u552f\u4e00\u7d04\u675f\u7684\u540d\u7a31<\/h3>\n<p>\u5728\u522a\u9664\u552f\u4e00\u7d04\u675f\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u77e5\u9053\u8a72\u7d04\u675f\u7684\u540d\u7a31\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u627e\u8cc7\u6599\u8868\u4e2d\u7684\u6240\u6709\u7d04\u675f\uff1a<\/p>\n<pre><code>SELECT \n    CONSTRAINT_NAME \nFROM \n    INFORMATION_SCHEMA.TABLE_CONSTRAINTS \nWHERE \n    TABLE_NAME = '\u60a8\u7684\u8cc7\u6599\u8868\u540d\u7a31' \n    AND CONSTRAINT_TYPE = 'UNIQUE';<\/code><\/pre>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-2%ef%bc%9a%e5%88%aa%e9%99%a4%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-LSvjLYvrMK\">\u6b65\u9a5f 2\uff1a\u522a\u9664\u552f\u4e00\u7d04\u675f<\/h3>\n<p>\u4e00\u65e6\u60a8\u627e\u5230\u4e86\u7d04\u675f\u7684\u540d\u7a31\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u522a\u9664\u5b83\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u7684\u8cc7\u6599\u8868\u540d\u70ba\u201cUsers\u201d\uff0c\u800c\u552f\u4e00\u7d04\u675f\u540d\u70ba\u201cUQ_Users_Email\u201d\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nDROP CONSTRAINT UQ_Users_Email;<\/code><\/pre>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-3%ef%bc%9a%e9%a9%97%e8%ad%89%e7%b4%84%e6%9d%9f%e5%b7%b2%e8%a2%ab%e5%88%aa%e9%99%a4-LSvjLYvrMK\">\u6b65\u9a5f 3\uff1a\u9a57\u8b49\u7d04\u675f\u5df2\u88ab\u522a\u9664<\/h3>\n<p>\u522a\u9664\u7d04\u675f\u5f8c\uff0c\u60a8\u53ef\u4ee5\u518d\u6b21\u57f7\u884c\u67e5\u8a62\u4f86\u78ba\u8a8d\u8a72\u7d04\u675f\u5df2\u4e0d\u518d\u5b58\u5728\uff1a<\/p>\n<pre><code>SELECT \n    CONSTRAINT_NAME \nFROM \n    INFORMATION_SCHEMA.TABLE_CONSTRAINTS \nWHERE \n    TABLE_NAME = 'Users';<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-LSvjLYvrMK\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u522a\u9664\u552f\u4e00\u7d04\u675f\u4e4b\u524d\uff0c\u8acb\u52d9\u5fc5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u522a\u9664\u552f\u4e00\u7d04\u675f\u5f8c\uff0c\u8cc7\u6599\u8868\u4e2d\u7684\u6578\u64da\u53ef\u80fd\u6703\u51fa\u73fe\u91cd\u8907\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<li>\u5728\u522a\u9664\u7d04\u675f\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u8cc7\u6599\u8868\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u78ba\u4fdd\u5728\u522a\u9664\u7d04\u675f\u5f8c\uff0c\u61c9\u7528\u7a0b\u5e8f\u908f\u8f2f\u4ecd\u7136\u80fd\u5920\u6b63\u78ba\u8655\u7406\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LSvjLYvrMK\">\u7e3d\u7d50<\/h2>\n<p>\u522a\u9664SQL Server\u4e2d\u7684\u552f\u4e00\u7d04\u675f\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4f46\u5728\u9032\u884c\u6b64\u64cd\u4f5c\u4e4b\u524d\uff0c\u5fc5\u9808\u4ed4\u7d30\u8003\u616e\u5176\u5c0d\u6578\u64da\u5b8c\u6574\u6027\u7684\u5f71\u97ff\u3002\u901a\u904e\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u8868\u4e2d\u7684\u7d04\u675f\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6b63\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\u670d\u52d9\uff0c\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u522a\u9664SQL Server\u4e2d\u7684\u552f\u4e00\u7d04\u675f\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u6027\u80fd\u512a\u5316\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\u6d41\u7a0b\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-180186","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180186","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=180186"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180186\/revisions"}],"predecessor-version":[{"id":180187,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180186\/revisions\/180187"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}