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WITH cte AS ( SELECT Id,Pid,DeptName,0 AS lvl FROM Department WHERE Id = 2 UNION all SELECT d.Id,d.Pid,d.DeptName,lvl+1 FROM cte c inner join Department d ON c.Pid = d.Id ) SELECT * FROM cte
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原文地址：http://www.cnblogs.com/shenyixin/p/5332767.html
