-->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
[email protected]
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
[email protected]
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
*/