sqlserver 递归查询

--递归查询所有上级用户

with my1 as

(

select *,0 as lvl from [OneBuy].[dbo].[T_User] where UserId = 4

union all

select [OneBuy].[dbo].[T_User].* ,lvl+1

from my1, [OneBuy].[dbo].[T_User]

where my1.ParentId = [OneBuy].[dbo].[T_User].UserId

)

select * from my1 ;

--递归查询所有下级用户

with my1 as

(

select *,0 as lvl from [OneBuy].[dbo].[T_User] where UserId = 3

union all

select [OneBuy].[dbo].[T_User].* ,lvl+1

from my1, [OneBuy].[dbo].[T_User]

where my1.UserId = [OneBuy].[dbo].[T_User].ParentId

)

select * from my1 where lvl>0 and lvl <4;