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sp help

Author

Topic

ann
Posting Yak Master

220 Posts

Posted - 2009-09-30 : 18:25:20

I need to know if a certain id exists in either of 2 different tables:

TableA:
ID = 2
ID = 6
ID = 4

TableB:
ID = 4
ID = 19

Results expected if parameter 2 is used: true
Results expected if parameter 4 is used: true
Results expected if parameter 19 is used: true
Results expected if parameter 33 is used: false

I tried doing an inner join but get no results:

select TableA.ID, TableB.ID from TableA
Inner Join TableB on TableA.ID = TableB.ID

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2009-09-30 : 18:44:56

Just UNION them together and use a derived table.

SELECT *
FROM (SELECT ID FROM TableA UNION ALL SELECT ID FROM TableB) Table1
WHERE ID = @n

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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"Let's begin with the premise that everything you've done up until this point is wrong."

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2009-10-01 : 02:12:13

or apply to each table and union them

SELECT ID FROM TableA
WHERE ID = @n
UNION ALL
SELECT ID FROM TableB
WHERE ID = @n

Madhivanan

Failing to plan is Planning to fail

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