Question

I’m writing an sql server query:

select * from vwApplicationList
            where status='Unassigned' AND
            BBL like '%' + @BBL + '%' AND
            UnitOrAppartmentNumber like '%'+@Appartment+'%' AND
            ResidenceTypeDescription like '%'+@ResidenceTypeDescription+'%' AND
            SN1 like '%'+@SN1+'%' AND
            SN2 like '%'+@SN2+'%'

The problem is that the field “SN2” is null in several records. So how can I compare them?

Answer 1

If you want a positive result on the comparison:

... AND COALESCE(SN2, @SN2) LIKE '%' + @SN2 + '%'

If you want a negative result (assuming @SN2 is not also an empty string):

... AND COALESCE(SN2, '') LIKE '%' + @SN2 + '%'