{"id":143695,"date":"2024-11-01T00:16:17","date_gmt":"2024-10-31T16:16:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143695\/"},"modified":"2024-11-01T00:16:18","modified_gmt":"2024-10-31T16:16:18","slug":"sql-server-%e8%a1%a8%e4%b8%ad%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e5%af%a6%e7%8f%be%e5%a4%9a%e6%a8%a3%e6%80%a7%e6%95%b8%e6%93%9a%e6%94%b9%e9%80%a0%ef%bc%88sqlserver-%e8%a1%a8%e6%9b%b4%e6%96%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143695\/","title":{"rendered":"SQL Server \u8868\u4e2d\u6578\u64da\u66f4\u65b0\u5be6\u73fe\u591a\u6a23\u6027\u6578\u64da\u6539\u9020\uff08sqlserver \u8868\u66f4\u65b0\uff09"},"content":{"rendered":"

SQL Server \u8868\u4e2d\u6578\u64da\u66f4\u65b0\u5be6\u73fe\u591a\u6a23\u6027\u6578\u64da\u6539\u9020<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u66f4\u65b0\u662f\u7dad\u6301\u6578\u64da\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u7684\u91cd\u8981\u64cd\u4f5c\u3002SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u66f4\u65b0\u8868\u4e2d\u7684\u6578\u64da\uff0c\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5920\u7c21\u55ae\u5730\u4fee\u6539\u6578\u64da\uff0c\u9084\u80fd\u5be6\u73fe\u591a\u6a23\u6027\u6578\u64da\u6539\u9020\uff0c\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u696d\u52d9\u9700\u6c42\u3002\u672c\u6587\u5c07\u63a2\u8a0e SQL Server \u4e2d\u6578\u64da\u66f4\u65b0\u7684\u5e7e\u7a2e\u5e38\u898b\u65b9\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n

\u57fa\u672c\u7684\u6578\u64da\u66f4\u65b0\u8a9e\u6cd5<\/h2>\n

\u5728 SQL Server \u4e2d\uff0c\u6700\u57fa\u672c\u7684\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\u662f\u4f7f\u7528 UPDATE<\/code> \u8a9e\u53e5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba Employees<\/code> \u7684\u8868\uff0c\u60f3\u8981\u66f4\u65b0\u67d0\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
UPDATE Employees\nSET Salary = 60000\nWHERE EmployeeID = 1;<\/code><\/pre>\n
\u4f7f\u7528 CASE \u8a9e\u53e5\u9032\u884c\u689d\u4ef6\u66f4\u65b0<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u4e0d\u540c\u7684\u689d\u4ef6\u4f86\u66f4\u65b0\u4e0d\u540c\u7684\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528 CASE<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8981\u6839\u64da\u54e1\u5de5\u7684\u8077\u4f4d\u4f86\u8abf\u6574\u85aa\u6c34\uff1a<\/p>\n
UPDATE Employees\nSET Salary = CASE \n                WHEN Position = 'Manager' THEN Salary * 1.1\n                WHEN Position = 'Developer' THEN Salary * 1.05\n                ELSE Salary\n             END;<\/code><\/pre>\n
\u9019\u6a23\u7684\u66f4\u65b0\u65b9\u5f0f\u53ef\u4ee5\u5728\u4e00\u6b21\u64cd\u4f5c\u4e2d\u5be6\u73fe\u591a\u7a2e\u689d\u4ef6\u7684\u6578\u64da\u6539\u9020\uff0c\u63d0\u5347\u4e86\u6548\u7387\u3002<\/p>\n
\u6279\u91cf\u66f4\u65b0\u6578\u64da<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u9700\u8981\u5c0d\u591a\u689d\u8a18\u9304\u9032\u884c\u6279\u91cf\u66f4\u65b0\u3002\u9019\u53ef\u4ee5\u901a\u904e JOIN<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b Departments<\/code> \u8868\uff0c\u4e26\u5e0c\u671b\u6839\u64da\u90e8\u9580\u7684\u9810\u7b97\u4f86\u66f4\u65b0\u54e1\u5de5\u7684\u85aa\u6c34\uff1a<\/p>\n
UPDATE e\nSET e.Salary = e.Salary * 1.1\nFROM Employees e\nJOIN Departments d ON e.DepartmentID = d.DepartmentID\nWHERE d.Budget > 100000;<\/code><\/pre>\n
\u9019\u6a23\u7684\u64cd\u4f5c\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u66f4\u65b0\u7684\u9748\u6d3b\u6027\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n
\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u9032\u884c\u6578\u64da\u66f4\u65b0<\/h2>\n
\u5c0d\u65bc\u8907\u96dc\u7684\u6578\u64da\u66f4\u65b0\u908f\u8f2f\uff0c\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u500b\u4e0d\u932f\u7684\u9078\u64c7\u3002\u5b58\u5132\u904e\u7a0b\u53ef\u4ee5\u5c01\u88dd\u591a\u500b SQL \u8a9e\u53e5\uff0c\u4e26\u4e14\u53ef\u4ee5\u63a5\u53d7\u53c3\u6578\uff0c\u5f9e\u800c\u5be6\u73fe\u66f4\u9748\u6d3b\u7684\u6578\u64da\u66f4\u65b0\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE PROCEDURE UpdateEmployeeSalary\n    @EmployeeID INT,\n    @NewSalary DECIMAL(10, 2)\nAS\nBEGIN\n    UPDATE Employees\n    SET Salary = @NewSalary\n    WHERE EmployeeID = @EmployeeID;\nEND;<\/code><\/pre>\n
\u9019\u6a23\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904e\u8abf\u7528\u5b58\u5132\u904e\u7a0b\u4f86\u66f4\u65b0\u7279\u5b9a\u54e1\u5de5\u7684\u85aa\u6c34\uff0c\u7c21\u5316\u4e86\u64cd\u4f5c\u6d41\u7a0b\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728 SQL Server \u4e2d\uff0c\u6578\u64da\u66f4\u65b0\u4e0d\u50c5\u50c5\u662f\u7c21\u55ae\u7684\u6578\u64da\u4fee\u6539\uff0c\u9084\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u6cd5\u5be6\u73fe\u591a\u6a23\u6027\u6578\u64da\u6539\u9020\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u57fa\u672c\u7684 UPDATE<\/code> \u8a9e\u53e5\u3001\u689d\u4ef6\u66f4\u65b0\u3001\u6279\u91cf\u66f4\u65b0\u9084\u662f\u5b58\u5132\u904e\u7a0b\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u5f0f\u4f86\u9032\u884c\u6578\u64da\u66f4\u65b0\u3002\u9019\u4e9b\u6280\u8853\u7684\u9748\u6d3b\u904b\u7528\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6578\u64da\u7ba1\u7406\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u63a2\u7d22\u6211\u5011\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u5728\u6578\u64da\u7ba1\u7406\u4e0a\u66f4\u4e0a\u4e00\u5c64\u6a13\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5982\u4f55\u5728 SQL Server \u4e2d\u5be6\u73fe\u591a\u6a23\u6027\u6578\u64da\u6539\u9020\uff0c\u901a\u904e\u9ad8\u6548\u7684\u8868\u66f4\u65b0\u6280\u8853\u63d0\u5347\u6578\u64da\u7ba1\u7406\u8207\u5206\u6790\u80fd\u529b\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-143695","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143695","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=143695"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143695\/revisions"}],"predecessor-version":[{"id":143696,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143695\/revisions\/143696"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}