Question

Is is possible to use a CASE statement inside an IN clause?

This is a simplified version of what I have been trying to get to compile correctly:

SELECT * FROM MyTable 
WHERE StatusID IN (
CASE WHEN @StatusID = 99 THEN (5, 11, 13)
ELSE (@StatusID) END )

Thanks!

Answer 1

CASE returns a scalar value only. You can do this instead. (I am assuming, as per your example, that when @StatusID = 99, a StatusID value of 99 is not a match.)

select *
from MyTable
where (@StatusID = 99 and StatusID in (5, 11, 13))
    or (@StatusID <> 99 and StatusID = @StatusID)