MS SQL Server递归查询

原文:MS SQL Server递归查询刚才在论坛上看到网友一个要求。参考如下，Insus.NET分析一下，可以使用MS SQL Server的递归查询，得到结果。

WITH TempDeptment ([ID],[PID],[DeptName],[Conjunction]) AS
(
SELECT [ID],[PID],[DeptName], CAST([DeptName] AS Nvarchar(1000)) FROM [dbo].[Deptment] WHERE [PID] = 0
UNION ALL
SELECT d.[ID], d.[PID], d.[DeptName], CAST(([Conjunction] + N'/' + d.[DeptName]) AS Nvarchar(1000))    FROM TempDeptment AS td,[dbo].[Deptment] AS d WHERE td.[ID] = d.[PID]
)
SELECT [ID], [Conjunction] FROM TempDeptment

View Code

运行结果：




Insus.NET以前也没有在SQL中实现过递归，现刚好有一个实例，算是练习了。