{"id":138409,"date":"2024-10-31T14:14:18","date_gmt":"2024-10-31T06:14:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138409\/"},"modified":"2024-10-31T14:14:19","modified_gmt":"2024-10-31T06:14:19","slug":"sql-server%e8%a1%a8%e7%9b%b8%e9%97%9c%e7%9a%84%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138409\/","title":{"rendered":"Sql Server\u8868\u76f8\u95dc\u7684\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"sql-server%e8%a1%a8%e7%9b%b8%e9%97%9c%e7%9a%84%e8%aa%9e%e5%8f%a5-SYhhIWtLWF\">SQL Server\u8868\u76f8\u95dc\u7684\u8a9e\u53e5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u8a9e\u53e5\u4f86\u64cd\u4f5c\u548c\u7ba1\u7406\u8cc7\u6599\u8868\u3002\u672c\u6587\u5c07\u63a2\u8a0eSQL Server\u4e2d\u8207\u8cc7\u6599\u8868\u76f8\u95dc\u7684\u4e3b\u8981\u8a9e\u53e5\uff0c\u5305\u62ec\u5275\u5efa\u3001\u4fee\u6539\u3001\u522a\u9664\u8cc7\u6599\u8868\u53ca\u5176\u7d50\u69cb\u7684\u8a9e\u53e5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"1-%e5%89%b5%e5%bb%ba%e8%b3%87%e6%96%99%e8%a1%a8-SYhhIWtLWF\">1. \u5275\u5efa\u8cc7\u6599\u8868<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u5275\u5efa\u8cc7\u6599\u8868\u7684\u8a9e\u53e5\u70baCREATE TABLE\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u8cc7\u6599\u8868\u7684\u540d\u7a31\u53ca\u5176\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u3002<\/p>\n<pre><code>CREATE TABLE Customers (\n    CustomerID INT PRIMARY KEY,\n    CustomerName NVARCHAR(100),\n    ContactName NVARCHAR(100),\n    Country NVARCHAR(50)\n);<\/code><\/pre>\n<p>\u4e0a\u8ff0\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70baCustomers\u7684\u8cc7\u6599\u8868\uff0c\u4e26\u5b9a\u7fa9\u4e86\u56db\u500b\u6b04\u4f4d\uff1aCustomerID\u3001CustomerName\u3001ContactName\u548cCountry\u3002\u5176\u4e2d\uff0cCustomerID\u88ab\u8a2d\u7f6e\u70ba\u4e3b\u9375\u3002<\/p>\n<h2 id=\"2-%e4%bf%ae%e6%94%b9%e8%b3%87%e6%96%99%e8%a1%a8-SYhhIWtLWF\">2. \u4fee\u6539\u8cc7\u6599\u8868<\/h2>\n<p>\u82e5\u9700\u4fee\u6539\u5df2\u5b58\u5728\u7684\u8cc7\u6599\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u53ef\u4ee5\u7528\u4f86\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u6b04\u4f4d\u3002<\/p>\n<h3 id=\"2-1-%e6%b7%bb%e5%8a%a0%e6%ac%84%e4%bd%8d-SYhhIWtLWF\">2.1 \u6dfb\u52a0\u6b04\u4f4d<\/h3>\n<pre><code>ALTER TABLE Customers\nADD Email NVARCHAR(100);<\/code><\/pre>\n<p>\u4ee5\u4e0a\u8a9e\u53e5\u5c07Email\u6b04\u4f4d\u6dfb\u52a0\u5230Customers\u8cc7\u6599\u8868\u4e2d\u3002<\/p>\n<h3 id=\"2-2-%e4%bf%ae%e6%94%b9%e6%ac%84%e4%bd%8d-SYhhIWtLWF\">2.2 \u4fee\u6539\u6b04\u4f4d<\/h3>\n<pre><code>ALTER TABLE Customers\nALTER COLUMN ContactName NVARCHAR(150);<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07ContactName\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u5f9eNVARCHAR(100)\u4fee\u6539\u70baNVARCHAR(150)\u3002<\/p>\n<h3 id=\"2-3-%e5%88%aa%e9%99%a4%e6%ac%84%e4%bd%8d-SYhhIWtLWF\">2.3 \u522a\u9664\u6b04\u4f4d<\/h3>\n<pre><code>ALTER TABLE Customers\nDROP COLUMN Country;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07Country\u6b04\u4f4d\u5f9eCustomers\u8cc7\u6599\u8868\u4e2d\u522a\u9664\u3002<\/p>\n<h2 id=\"3-%e5%88%aa%e9%99%a4%e8%b3%87%e6%96%99%e8%a1%a8-SYhhIWtLWF\">3. \u522a\u9664\u8cc7\u6599\u8868<\/h2>\n<p>\u82e5\u9700\u522a\u9664\u6574\u500b\u8cc7\u6599\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528DROP TABLE\u8a9e\u53e5\u3002\u9019\u5c07\u6c38\u4e45\u522a\u9664\u8cc7\u6599\u8868\u53ca\u5176\u6240\u6709\u6578\u64da\u3002<\/p>\n<pre><code>DROP TABLE Customers;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0cCustomers\u8cc7\u6599\u8868\u5c07\u88ab\u522a\u9664\uff0c\u7121\u6cd5\u6062\u5fa9\u3002<\/p>\n<h2 id=\"4-%e6%9f%a5%e8%a9%a2%e8%b3%87%e6%96%99%e8%a1%a8%e7%b5%90%e6%a7%8b-SYhhIWtLWF\">4. \u67e5\u8a62\u8cc7\u6599\u8868\u7d50\u69cb<\/h2>\n<p>\u8981\u67e5\u770b\u8cc7\u6599\u8868\u7684\u7d50\u69cb\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>EXEC sp_help 'Customers';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u986f\u793aCustomers\u8cc7\u6599\u8868\u7684\u6240\u6709\u6b04\u4f4d\u53ca\u5176\u6578\u64da\u985e\u578b\u3001\u5927\u5c0f\u7b49\u4fe1\u606f\u3002<\/p>\n<h2 id=\"5-%e8%b3%87%e6%96%99%e8%a1%a8%e7%9a%84%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-SYhhIWtLWF\">5. \u8cc7\u6599\u8868\u7684\u7d04\u675f\u689d\u4ef6<\/h2>\n<p>\u5728\u5275\u5efa\u6216\u4fee\u6539\u8cc7\u6599\u8868\u6642\uff0c\u53ef\u4ee5\u6dfb\u52a0\u7d04\u675f\u689d\u4ef6\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u5e38\u898b\u7684\u7d04\u675f\u689d\u4ef6\u5305\u62ec\u4e3b\u9375\u3001\u5916\u9375\u3001\u552f\u4e00\u6027\u7d04\u675f\u548c\u6aa2\u67e5\u7d04\u675f\u3002<\/p>\n<h3 id=\"5-1-%e4%b8%bb%e9%8d%b5%e7%b4%84%e6%9d%9f-SYhhIWtLWF\">5.1 \u4e3b\u9375\u7d04\u675f<\/h3>\n<pre><code>CREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    CustomerID INT,\n    OrderDate DATETIME,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0cOrders\u8cc7\u6599\u8868\u7684OrderID\u6b04\u4f4d\u88ab\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff0cCustomerID\u6b04\u4f4d\u5247\u8a2d\u7f6e\u70ba\u5916\u9375\uff0c\u53c3\u8003Customers\u8cc7\u6599\u8868\u7684CustomerID\u6b04\u4f4d\u3002<\/p>\n<h3 id=\"5-2-%e5%94%af%e4%b8%80%e6%80%a7%e7%b4%84%e6%9d%9f-SYhhIWtLWF\">5.2 \u552f\u4e00\u6027\u7d04\u675f<\/h3>\n<pre><code>ALTER TABLE Customers\nADD CONSTRAINT UQ_Email UNIQUE (Email);<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u70baCustomers\u8cc7\u6599\u8868\u7684Email\u6b04\u4f4d\u6dfb\u52a0\u4e86\u552f\u4e00\u6027\u7d04\u675f\uff0c\u78ba\u4fdd\u6bcf\u500bEmail\u5730\u5740\u90fd\u662f\u552f\u4e00\u7684\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SYhhIWtLWF\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86SQL Server\u4e2d\u8207\u8cc7\u6599\u8868\u76f8\u95dc\u7684\u57fa\u672c\u8a9e\u53e5\uff0c\u5305\u62ec\u5275\u5efa\u3001\u4fee\u6539\u3001\u522a\u9664\u8cc7\u6599\u8868\u53ca\u5176\u7d50\u69cb\u7684\u8a9e\u53e5\uff0c\u4e26\u63a2\u8a0e\u4e86\u8cc7\u6599\u8868\u7684\u7d04\u675f\u689d\u4ef6\u3002\u9019\u4e9b\u8a9e\u53e5\u662f\u8cc7\u6599\u5eab\u7ba1\u7406\u7684\u57fa\u790e\uff0c\u5c0d\u65bc\u6709\u6548\u7ba1\u7406\u548c\u64cd\u4f5c\u8cc7\u6599\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u696d\u52d9\u904b\u884c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u8868\u76f8\u95dc\u8a9e\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u5275\u5efa\u3001\u4fee\u6539\u548c\u67e5\u8a62\u6578\u64da\u8868\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-138409","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138409","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=138409"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138409\/revisions"}],"predecessor-version":[{"id":138410,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138409\/revisions\/138410"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138409"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138409"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}