{"id":185438,"date":"2024-11-10T21:33:16","date_gmt":"2024-11-10T13:33:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185438\/"},"modified":"2024-11-10T21:33:17","modified_gmt":"2024-11-10T13:33:17","slug":"%e4%bd%bf%e7%94%a8%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%e9%a9%97%e8%ad%89sql-server%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185438\/","title":{"rendered":"\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\u9a57\u8b49SQL Server\u4e2d\u7684\u6578\u64da"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%e9%a9%97%e8%ad%89sql-server%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a-UZIYvNMBiO\">\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\u9a57\u8b49SQL Server\u4e2d\u7684\u6578\u64da<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u6027\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\uff08CHECK Constraints\uff09\u3002\u6aa2\u67e5\u7d04\u675f\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u7279\u5b9a\u7684\u689d\u4ef6\uff0c\u53ea\u6709\u7576\u6578\u64da\u6eff\u8db3\u9019\u4e9b\u689d\u4ef6\u6642\uff0c\u624d\u80fd\u88ab\u63d2\u5165\u6216\u66f4\u65b0\u5230\u6578\u64da\u8868\u4e2d\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6aa2\u67e5\u7d04\u675f\u7684\u6982\u5ff5\u3001\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u5728SQL Server\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%ef%bc%9f-UZIYvNMBiO\">\u4ec0\u9ebc\u662f\u6aa2\u67e5\u7d04\u675f\uff1f<\/h2>\n<p>\u6aa2\u67e5\u7d04\u675f\u662f\u4e00\u7a2e\u6578\u64da\u5b8c\u6574\u6027\u7d04\u675f\uff0c\u7528\u65bc\u9650\u5236\u53ef\u4ee5\u63d2\u5165\u6216\u66f4\u65b0\u5230\u6578\u64da\u8868\u4e2d\u7684\u6578\u64da\u3002\u5b83\u53ef\u4ee5\u7528\u4f86\u78ba\u4fdd\u67d0\u4e00\u5217\u7684\u6578\u64da\u7b26\u5408\u7279\u5b9a\u7684\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\u4f86\u78ba\u4fdd\u67d0\u500b\u5e74\u9f61\u5b57\u6bb5\u7684\u503c\u5fc5\u9808\u5927\u65bc0\uff0c\u6216\u8005\u67d0\u500b\u50f9\u683c\u5b57\u6bb5\u7684\u503c\u5fc5\u9808\u5728\u7279\u5b9a\u7bc4\u570d\u5167\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%e7%9a%84%e8%aa%9e%e6%b3%95-UZIYvNMBiO\">\u6aa2\u67e5\u7d04\u675f\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u6aa2\u67e5\u7d04\u675f\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d\nADD CONSTRAINT \u7d04\u675f\u540d CHECK (\u689d\u4ef6);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cEmployees\u201d\u7684\u8868\uff0c\u6211\u5011\u5e0c\u671b\u78ba\u4fdd\u201cAge\u201d\u5217\u7684\u503c\u5fc5\u9808\u5927\u65bc18\u6b72\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u6dfb\u52a0\u6aa2\u67e5\u7d04\u675f\uff1a<\/p>\n<pre><code>ALTER TABLE Employees\nADD CONSTRAINT chk_Age CHECK (Age &gt; 18);<\/code><\/pre>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%e7%9a%84%e6%87%89%e7%94%a8%e7%a4%ba%e4%be%8b-UZIYvNMBiO\">\u6aa2\u67e5\u7d04\u675f\u7684\u61c9\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u66f4\u5177\u9ad4\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u5275\u5efa\u8868\u6642\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\uff1a<\/p>\n<pre><code>CREATE TABLE Products (\n    ProductID INT PRIMARY KEY,\n    ProductName NVARCHAR(100),\n    Price DECIMAL(10, 2),\n    Quantity INT,\n    CHECK (Price &gt; 0),\n    CHECK (Quantity &gt;= 0)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba\u201cProducts\u201d\u7684\u8868\uff0c\u4e26\u70ba\u201cPrice\u201d\u548c\u201cQuantity\u201d\u5217\u6dfb\u52a0\u4e86\u6aa2\u67e5\u7d04\u675f\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u50f9\u683c\u5fc5\u9808\u5927\u65bc0\uff0c\u800c\u6578\u91cf\u5fc5\u9808\u662f0\u6216\u66f4\u5927\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e7%b4%84%e6%9d%9f%e7%9a%84%e5%84%aa%e5%8b%a2-UZIYvNMBiO\">\u6aa2\u67e5\u7d04\u675f\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u6aa2\u67e5\u7d04\u675f\u5e6b\u52a9\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\uff0c\u9632\u6b62\u4e0d\u5408\u898f\u7684\u6578\u64da\u9032\u5165\u6578\u64da\u5eab\u3002<\/li>\n<li><strong>\u7c21\u5316\u6578\u64da\u9a57\u8b49\uff1a<\/strong>\u901a\u904e\u5728\u6578\u64da\u5eab\u5c64\u9762\u9032\u884c\u9a57\u8b49\uff0c\u6e1b\u5c11\u4e86\u61c9\u7528\u7a0b\u5e8f\u5c64\u9762\u7684\u6578\u64da\u6aa2\u67e5\u5de5\u4f5c\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u6aa2\u67e5\u7d04\u675f\u7684\u9a57\u8b49\u901a\u5e38\u6bd4\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u9032\u884c\u9a57\u8b49\u66f4\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-UZIYvNMBiO\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5118\u7ba1\u6aa2\u67e5\u7d04\u675f\u63d0\u4f9b\u4e86\u8a31\u591a\u512a\u52e2\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u6aa2\u67e5\u7d04\u675f\u7684\u689d\u4ef6\u5fc5\u9808\u662f\u53ef\u8a08\u7b97\u7684\uff0c\u4e26\u4e14\u4e0d\u80fd\u4f9d\u8cf4\u65bc\u5176\u4ed6\u884c\u7684\u6578\u64da\u3002<\/li>\n<li>\u904e\u591a\u7684\u6aa2\u67e5\u7d04\u675f\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u63d2\u5165\u548c\u66f4\u65b0\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li>\u5728\u4fee\u6539\u6216\u522a\u9664\u6aa2\u67e5\u7d04\u675f\u4e4b\u524d\uff0c\u5fc5\u9808\u78ba\u4fdd\u4e0d\u6703\u5f71\u97ff\u73fe\u6709\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-UZIYvNMBiO\">\u7e3d\u7d50<\/h2>\n<p>\u6aa2\u67e5\u7d04\u675f\u662fSQL Server\u4e2d\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u6e1b\u5c11\u932f\u8aa4\u548c\u4e0d\u4e00\u81f4\u7684\u98a8\u96aa\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\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\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728SQL Server\u4e2d\u4f7f\u7528\u6aa2\u67e5\u7d04\u675f\u4f86\u9a57\u8b49\u6578\u64da\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u6e96\u78ba\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-185438","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185438","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=185438"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185438\/revisions"}],"predecessor-version":[{"id":185439,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185438\/revisions\/185439"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}