SQL无限级查询

在网上找了个SQL无限级查询，以树形显示的查询 ，没找到，自己写了一个，想到也有别的兄弟也可能遇到，拿出看看希望有所帮助。。

下面两种 

第一种：一般类型网上很多

代码：

with T as
(
select *   from va where PID =0
union all
select a.* from [va] a join T b on a.[PID] = b.CID  
)
select * from T 

显示效果：

第二种：树形显示

代码：

WITH T AS
(
    SELECT *,CAST(CID AS VARBINARY(MAX)) AS f
    FROM va AS A
    WHERE NOT EXISTS(SELECT * FROM va WHERE CID=A.[PID])
    UNION ALL
    SELECT A.*,CAST(B.f+CAST(A.CID AS VARBINARY) AS VARBINARY(MAX)) 
    FROM va AS A
        JOIN T AS B
           ON A.[PID]=B.CID
)
SELECT [CID],[PID],[Name] FROM T
ORDER BY f

展示效果：