递归方式
--子级
with cte as
(
select 0 as LVL,* from Customer with (nolock) where CId =636
union all
select LVL+1 ,c.* from Customer c with (nolock) join cte p
on c.ParentId = p.CId
)
select * from cte where LVL > 0
--父级
with cte as
(
select 0 as LVL,* from Customer with (nolock) where CId = 632
union all
select LVL+1 , p.* from cte c join Customer p with (nolock)
on c.ParentId = p.CId
)
select * from cte c where LVL > 0 and LVL<4 //LVL级别