Query for multi level dependencies

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Query for multi level dependencies

Author

Topic

Ranjit.ileni
Posting Yak Master

183 Posts

Posted - 2011-09-13 : 04:18:04

Hi all,


create table #temp
(
 ID int
,IntroducerID int
)

insert into #temp 
select 1,1 union all
select 2,1 union all
select 3,2 union all
select 4,2 union all
select 5,3 union all
select 6,3 union all
select 7,4 union all
select 8,4 union all
select 9,5 union all
select 10,5 


SELECT * FROM #TEMP

Query need To select internal dependencies (like tree structure)

Expected Output:
IF IntroducerID=3 then Output should be

ID	IntroducerID
5	3
6	3
9	5
10	5

IF IntroducerID=2 then Output should be

ID	IntroducerID
3	2
4	2
5	3
6	3
7	4
8	4
9	5
10	5


IF IntroducerID=1 then Output should be

ID	IntroducerID
1	1
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	5
10	5

Please help me
--Ranjit

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-09-13 : 04:34:24

[code]
;with cte(ID, IntroducerID)
as
(
select ID, IntroducerID
from #temp
where IntroducerID=@IntroducerID
union all
select t.ID,t.IntroducerID
from cte c
join #temp t
on t.IntroducerID =c.ID
)
select * from cte
option (maxrecursion 0)
[/code]

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

Ranjit.ileni
Posting Yak Master

183 Posts

Posted - 2011-09-13 : 04:36:59

Thanks visakh16,

Recursive CTEs are really very hlepfull

--Ranjit

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-09-13 : 04:46:02

welcome
yeah...they really are

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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