MSSQL 查找子結節與父節點
-->Title:Generating test data
-->Author:wufeng4552
-->Date :2009-09-30 08:52:38
set nocount on
if object_id('tb','U')is not null drop table tb
go
create table tb(ID int, ParentID int)
insert into tb select 1,0
insert into tb select 2,1
insert into tb select 3,1
insert into tb select 4,2
insert into tb select 5,3
insert into tb select 6,5
insert into tb select 7,6
-->Title:查找指定節點下的子結點
if object_id('Uf_GetChildID')is not null drop function Uf_GetChildID
go
create function Uf_GetChildID(@ParentID int)
returns @t table(ID int)
as
begin
insert @t select ID from tb where ParentID=@ParentID
while @@rowcount<>0
begin
insert @t select a.ID from tb a inner join @t b
on a.ParentID=b.id and
not exists(select 1 from @t where id=a.id)
end
return
end
go
select * from dbo.Uf_GetChildID(5)
/*
ID
-----------
6
7
*/
-->Title:查找指定節點的所有父結點
if object_id('Uf_GetParentID')is not null drop function Uf_GetParentID
go
create function Uf_GetParentID(@ID int)
returns @t table(ParentID int)
as
begin
insert @t select ParentID from tb where ID=@ID
while @@rowcount!=0
begin
insert @t select a.ParentID from tb a inner join @t b
on a.id=b.ParentID and
not exists(select 1 from @t where ParentID=a.ParentID)
end
return
end
go
select * from dbo.Uf_GetParentID(2)
/*
ParentID
-----------
1
0
*/