{"id":141259,"date":"2024-10-31T21:34:02","date_gmt":"2024-10-31T13:34:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/141259\/"},"modified":"2024-10-31T21:34:03","modified_gmt":"2024-10-31T13:34:03","slug":"sql-server-%e4%b8%ad%e7%9a%84%e9%81%9e%e6%ad%b8%e6%a8%b9%e6%8a%80%e8%a1%93%e5%8f%8a%e5%85%b6%e6%87%89%e7%94%a8%ef%bc%88sqlserver-%e9%81%9e%e6%ad%b8%e6%a8%b9%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/141259\/","title":{"rendered":"SQL Server \u4e2d\u7684\u905e\u6b78\u6a39\u6280\u8853\u53ca\u5176\u61c9\u7528\uff08sqlserver \u905e\u6b78\u6a39\uff09"},"content":{"rendered":"<h1 id=\"sql-server-%e4%b8%ad%e7%9a%84%e9%81%9e%e6%ad%b8%e6%a8%b9%e6%8a%80%e8%a1%93%e5%8f%8a%e5%85%b6%e6%87%89%e7%94%a8-bipsxtsLuD\">SQL Server \u4e2d\u7684\u905e\u6b78\u6a39\u6280\u8853\u53ca\u5176\u61c9\u7528<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6a39\u5f62\u7d50\u69cb\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u6578\u64da\u7d44\u7e54\u65b9\u5f0f\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5c64\u7d1a\u95dc\u4fc2\u6642\u3002SQL Server \u63d0\u4f9b\u4e86\u905e\u6b78\u67e5\u8a62\u7684\u529f\u80fd\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u8f15\u9b06\u5730\u67e5\u8a62\u548c\u64cd\u4f5c\u6a39\u5f62\u7d50\u69cb\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQL Server \u4e2d\u7684\u905e\u6b78\u6a39\u6280\u8853\u53ca\u5176\u61c9\u7528\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e9%81%9e%e6%ad%b8%e6%a8%b9%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-bipsxtsLuD\">\u905e\u6b78\u6a39\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u905e\u6b78\u6a39\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5176\u4e2d\u6bcf\u500b\u7bc0\u9ede\u53ef\u4ee5\u6709\u96f6\u500b\u6216\u591a\u500b\u5b50\u7bc0\u9ede\uff0c\u4e26\u4e14\u6bcf\u500b\u5b50\u7bc0\u9ede\u53c8\u53ef\u4ee5\u6709\u81ea\u5df1\u7684\u5b50\u7bc0\u9ede\u3002\u9019\u7a2e\u7d50\u69cb\u5728\u8a31\u591a\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u7d44\u7e54\u7d50\u69cb\u5716\u3001\u7522\u54c1\u5206\u985e\u3001\u6587\u4ef6\u7cfb\u7d71\u7b49\u3002<\/p>\n<p>\u5728 SQL Server \u4e2d\uff0c\u905e\u6b78\u67e5\u8a62\u901a\u5e38\u4f7f\u7528 Common Table Expressions\uff08CTE\uff09\u4f86\u5be6\u73fe\u3002CTE \u662f\u4e00\u7a2e\u81e8\u6642\u7d50\u679c\u96c6\uff0c\u53ef\u4ee5\u5728 SELECT\u3001INSERT\u3001UPDATE \u6216 DELETE \u8a9e\u53e5\u4e2d\u4f7f\u7528\u3002\u4f7f\u7528 CTE\uff0c\u6211\u5011\u53ef\u4ee5\u5b9a\u7fa9\u4e00\u500b\u905e\u6b78\u67e5\u8a62\uff0c\u5f9e\u800c\u904d\u6b77\u6a39\u5f62\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-cte-%e5%af%a6%e7%8f%be%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2-bipsxtsLuD\">\u4f7f\u7528 CTE \u5be6\u73fe\u905e\u6b78\u67e5\u8a62<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 CTE \u4f86\u67e5\u8a62\u4e00\u500b\u6a39\u5f62\u7d50\u69cb\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>Employees<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u54e1\u5de5\u7684 ID\u3001\u59d3\u540d\u548c\u4e0a\u7d1a ID\u3002<\/p>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID INT PRIMARY KEY,\n    Name NVARCHAR(100),\n    ManagerID INT\n);\n\nINSERT INTO Employees (EmployeeID, Name, ManagerID) VALUES\n(1, 'Alice', NULL),\n(2, 'Bob', 1),\n(3, 'Charlie', 1),\n(4, 'David', 2),\n(5, 'Eve', 2);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cAlice \u662f\u6700\u9ad8\u5c64\u7684\u7ba1\u7406\u8005\uff0cBob \u548c Charlie \u662f\u5979\u7684\u4e0b\u5c6c\uff0c\u800c David \u548c Eve \u662f Bob \u7684\u4e0b\u5c6c\u3002<\/p>\n<h3 id=\"%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-bipsxtsLuD\">\u905e\u6b78\u67e5\u8a62\u793a\u4f8b<\/h3>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684 CTE \u4f86\u67e5\u8a62\u6240\u6709\u54e1\u5de5\u53ca\u5176\u5c64\u7d1a\u7d50\u69cb\uff1a<\/p>\n<pre><code>WITH EmployeeHierarchy AS (\n    SELECT EmployeeID, Name, ManagerID, 0 AS Level\n    FROM Employees\n    WHERE ManagerID IS NULL\n    UNION ALL\n    SELECT e.EmployeeID, e.Name, e.ManagerID, eh.Level + 1\n    FROM Employees e\n    INNER JOIN EmployeeHierarchy eh ON e.ManagerID = eh.EmployeeID\n)\nSELECT * FROM EmployeeHierarchy;\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u7b2c\u4e00\u90e8\u5206\u9078\u64c7\u4e86\u6240\u6709\u6c92\u6709\u4e0a\u7d1a\u7684\u54e1\u5de5\uff08\u5373\u6839\u7bc0\u9ede\uff09\uff0c\u7b2c\u4e8c\u90e8\u5206\u5247\u901a\u904e\u81ea\u6211\u806f\u63a5\u4f86\u67e5\u8a62\u6240\u6709\u4e0b\u5c6c\u3002\u6700\u7d42\u7684\u7d50\u679c\u5c07\u986f\u793a\u6bcf\u500b\u54e1\u5de5\u53ca\u5176\u5c64\u7d1a\u3002<\/p>\n<h2 id=\"%e9%81%9e%e6%ad%b8%e6%a8%b9%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-bipsxtsLuD\">\u905e\u6b78\u6a39\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u905e\u6b78\u6a39\u6280\u8853\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u6709\u5ee3\u6cdb\u7684\u61c9\u7528\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<\/p>\n<ul>\n<li><strong>\u7d44\u7e54\u7d50\u69cb\u7ba1\u7406\uff1a<\/strong>\u4f01\u696d\u53ef\u4ee5\u4f7f\u7528\u905e\u6b78\u67e5\u8a62\u4f86\u7ba1\u7406\u548c\u67e5\u8a62\u54e1\u5de5\u7684\u5c64\u7d1a\u7d50\u69cb\u3002<\/li>\n<li><strong>\u7522\u54c1\u5206\u985e\uff1a<\/strong>\u5728\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u4e2d\uff0c\u7522\u54c1\u901a\u5e38\u4ee5\u6a39\u5f62\u7d50\u69cb\u9032\u884c\u5206\u985e\uff0c\u905e\u6b78\u67e5\u8a62\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u627e\u5230\u6240\u9700\u7684\u7522\u54c1\u3002<\/li>\n<li><strong>\u6587\u4ef6\u7cfb\u7d71\uff1a<\/strong>\u64cd\u4f5c\u7cfb\u7d71\u4e2d\u7684\u6587\u4ef6\u548c\u6587\u4ef6\u593e\u7d50\u69cb\u4e5f\u53ef\u4ee5\u4f7f\u7528\u905e\u6b78\u6a39\u4f86\u8868\u793a\uff0c\u65b9\u4fbf\u7528\u6236\u9032\u884c\u67e5\u8a62\u548c\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bipsxtsLuD\">\u7e3d\u7d50<\/h2>\n<p>SQL Server \u4e2d\u7684\u905e\u6b78\u6a39\u6280\u8853\u70ba\u8655\u7406\u5c64\u7d1a\u6578\u64da\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u3002\u901a\u904e\u4f7f\u7528 CTE\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u67e5\u8a62\u548c\u64cd\u4f5c\u6a39\u5f62\u7d50\u69cb\u7684\u6578\u64da\uff0c\u5f9e\u800c\u5728\u5404\u7a2e\u61c9\u7528\u5834\u666f\u4e2d\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u7121\u8ad6\u662f\u5728\u7d44\u7e54\u7d50\u69cb\u7ba1\u7406\u3001\u7522\u54c1\u5206\u985e\u9084\u662f\u6587\u4ef6\u7cfb\u7d71\u4e2d\uff0c\u905e\u6b78\u67e5\u8a62\u90fd\u80fd\u5920\u63d0\u4f9b\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL Server \u4e2d\u7684\u905e\u6b78\u6a39\u6280\u8853\u53ca\u5176\u61c9\u7528\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u67e5\u8a62\u5c64\u6b21\u7d50\u69cb\u6578\u64da\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-141259","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141259","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=141259"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141259\/revisions"}],"predecessor-version":[{"id":141260,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141259\/revisions\/141260"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=141259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=141259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=141259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}