{"id":140558,"date":"2024-10-31T20:42:17","date_gmt":"2024-10-31T12:42:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/140558\/"},"modified":"2024-10-31T20:42:18","modified_gmt":"2024-10-31T12:42:18","slug":"sql-server%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/140558\/","title":{"rendered":"SQL Server\u552f\u4e00\u7d04\u675f\u7684\u4f7f\u7528\u65b9\u6cd5\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"sql-server%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e7%b0%a1%e4%bb%8b-YPqEbDIEek\">SQL Server\u552f\u4e00\u7d04\u675f\u7684\u4f7f\u7528\u65b9\u6cd5\u7c21\u4ecb<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d04\u675f\u662f\u7528\u4f86\u78ba\u4fdd\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u7684\u91cd\u8981\u5de5\u5177\u3002SQL Server\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d04\u675f\u985e\u578b\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u552f\u4e00\u7d04\u675f\uff08UNIQUE constraint\uff09\u3002\u672c\u6587\u5c07\u4ecb\u7d39SQL Server\u552f\u4e00\u7d04\u675f\u7684\u57fa\u672c\u6982\u5ff5\u3001\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u5be6\u969b\u61c9\u7528\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%ef%bc%9f-YPqEbDIEek\">\u4ec0\u9ebc\u662f\u552f\u4e00\u7d04\u675f\uff1f<\/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\u503c\u5728\u8cc7\u6599\u8868\u4e2d\u662f\u552f\u4e00\u7684\u3002\u9019\u610f\u5473\u8457\u5728\u8a72\u5217\u4e2d\u4e0d\u5141\u8a31\u6709\u91cd\u8907\u7684\u503c\u3002\u552f\u4e00\u7d04\u675f\u901a\u5e38\u7528\u65bc\u9700\u8981\u4fdd\u6301\u8cc7\u6599\u552f\u4e00\u6027\u7684\u60c5\u6cc1\uff0c\u4f8b\u5982\u7528\u6236\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u6216\u5176\u4ed6\u8b58\u5225\u78bc\u3002<\/p>\n<h2 id=\"%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e7%89%b9%e6%80%a7-YPqEbDIEek\">\u552f\u4e00\u7d04\u675f\u7684\u7279\u6027<\/h2>\n<ul>\n<li>\u552f\u4e00\u7d04\u675f\u53ef\u4ee5\u61c9\u7528\u65bc\u4e00\u500b\u6216\u591a\u500b\u5217\u3002<\/li>\n<li>\u5728\u552f\u4e00\u7d04\u675f\u7684\u5217\u4e2d\uff0cNULL\u503c\u662f\u5141\u8a31\u7684\uff0c\u4f46\u6bcf\u500bNULL\u503c\u88ab\u8996\u70ba\u4e0d\u540c\u7684\u503c\u3002<\/li>\n<li>\u4e00\u500b\u8cc7\u6599\u8868\u53ef\u4ee5\u6709\u591a\u500b\u552f\u4e00\u7d04\u675f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8sql-server%e4%b8%ad%e5%89%b5%e5%bb%ba%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-YPqEbDIEek\">\u5982\u4f55\u5728SQL Server\u4e2d\u5275\u5efa\u552f\u4e00\u7d04\u675f<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u53ef\u4ee5\u5728\u5275\u5efa\u8cc7\u6599\u8868\u6642\u6216\u5728\u8cc7\u6599\u8868\u5df2\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u6dfb\u52a0\u552f\u4e00\u7d04\u675f\u3002\u4ee5\u4e0b\u662f\u5169\u7a2e\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e5%9c%a8%e5%89%b5%e5%bb%ba%e8%b3%87%e6%96%99%e8%a1%a8%e6%99%82%e6%b7%bb%e5%8a%a0%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-YPqEbDIEek\">1. \u5728\u5275\u5efa\u8cc7\u6599\u8868\u6642\u6dfb\u52a0\u552f\u4e00\u7d04\u675f<\/h3>\n<pre><code>\nCREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    UserName NVARCHAR(50) UNIQUE,\n    Email NVARCHAR(100) UNIQUE\n);\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cUserName\u548cEmail\u5217\u90fd\u88ab\u8a2d\u7f6e\u70ba\u552f\u4e00\u7d04\u675f\uff0c\u9019\u610f\u5473\u8457\u5728Users\u8868\u4e2d\uff0c\u9019\u5169\u5217\u7684\u503c\u4e0d\u80fd\u91cd\u8907\u3002<\/p>\n<h3 id=\"2-%e5%9c%a8%e5%b7%b2%e5%ad%98%e5%9c%a8%e7%9a%84%e8%b3%87%e6%96%99%e8%a1%a8%e4%b8%ad%e6%b7%bb%e5%8a%a0%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-YPqEbDIEek\">2. \u5728\u5df2\u5b58\u5728\u7684\u8cc7\u6599\u8868\u4e2d\u6dfb\u52a0\u552f\u4e00\u7d04\u675f<\/h3>\n<pre><code>\nALTER TABLE Users\nADD CONSTRAINT UQ_UserName UNIQUE (UserName);\n<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u8a9e\u53e5\u5c07\u5728Users\u8868\u4e2d\u70baUserName\u5217\u6dfb\u52a0\u552f\u4e00\u7d04\u675f\uff0c\u78ba\u4fdd\u8a72\u5217\u7684\u503c\u4e0d\u6703\u91cd\u8907\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e6%9c%89%e6%95%88%e6%80%a7-YPqEbDIEek\">\u6aa2\u67e5\u552f\u4e00\u7d04\u675f\u7684\u6709\u6548\u6027<\/h2>\n<p>\u7576\u63d2\u5165\u6216\u66f4\u65b0\u8cc7\u6599\u6642\uff0cSQL Server\u6703\u81ea\u52d5\u6aa2\u67e5\u552f\u4e00\u7d04\u675f\u7684\u6709\u6548\u6027\u3002\u5982\u679c\u8a66\u5716\u63d2\u5165\u91cd\u8907\u7684\u503c\uff0c\u7cfb\u7d71\u5c07\u8fd4\u56de\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nINSERT INTO Users (UserID, UserName, Email) VALUES (1, 'john_doe', 'john@example.com');\nINSERT INTO Users (UserID, UserName, Email) VALUES (2, 'john_doe', 'john2@example.com'); -- \u9019\u5c07\u5c0e\u81f4\u932f\u8aa4\n<\/code><\/pre>\n<h2 id=\"%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-YPqEbDIEek\">\u552f\u4e00\u7d04\u675f\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u552f\u4e00\u7d04\u675f\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u4e2d\uff0c\u78ba\u4fdd\u6bcf\u500b\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u662f\u552f\u4e00\u7684\uff0c\u53ef\u4ee5\u9632\u6b62\u91cd\u8907\u8a3b\u518a\u3002\u5728\u793e\u4ea4\u5a92\u9ad4\u5e73\u53f0\u4e0a\uff0c\u4f7f\u7528\u8005\u540d\u7a31\u7684\u552f\u4e00\u6027\u4e5f\u80fd\u5920\u63d0\u5347\u7528\u6236\u9ad4\u9a57\uff0c\u907f\u514d\u6df7\u6dc6\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-YPqEbDIEek\">\u7e3d\u7d50<\/h2>\n<p>SQL Server\u7684\u552f\u4e00\u7d04\u675f\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u78ba\u4fdd\u8cc7\u6599\u7684\u552f\u4e00\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u552f\u4e00\u7d04\u675f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u5eab\u4e2d\u7684\u8cc7\u6599\uff0c\u907f\u514d\u91cd\u8907\u548c\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8cc7\u6599\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3SQL Server\u552f\u4e00\u7d04\u675f\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u552f\u4e00\u6027\uff0c\u907f\u514d\u91cd\u8907\u8a18\u9304\uff0c\u63d0\u9ad8\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-140558","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140558","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=140558"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140558\/revisions"}],"predecessor-version":[{"id":140559,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140558\/revisions\/140559"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=140558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=140558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=140558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}