Question

I have a where clause as such

    ... Where TruckID IN (select VanID from Vantbl)

I like to use a case so it can be smart enough

I have the folloiwng

     ...  Where TruckID IN 
       CASE WHEN @VehicleType = 'VAN'
        THEN (select VanID from Vantbl)
      CASE WHEN @VehicleType = 'SUV'
       THEN (select SUVID from SUVtbl)
     END

but does nto seem to work. Any way I can get it to work as such.

Answer 1

I’d recommend an EXISTS instead of an IN:

WHERE EXISTS (
    SELECT 1
    FROM Vantbl
    WHERE @VehicleType = 'VAN' AND TruckID = VanID
) OR EXISTS (
    SELECT 1
    FROM SUVtbl
    WHERE @VehicleType = 'SUV' AND TruckID = SUVID 
)