Question

Question is simple – I believe answer may be simple too.

System is SQL Server 2008 R2.

There is a stored procedure sp_WHYWHYWHY which takes 3 parameters – 2 are dates and one is supplier code.

The WHERE clause in the statement looks something like this:

OrderDate BETWEEN @StartDate AND @EndDate
AND SupplierCode = @SupplierCode

The business process has changed – as it always will. So now in the supplier code there is only one supplier (let’s say YY)who is now aligned, business-wise, to another supplier (let’s say ABC).

Hence the code needs to say when querying for ABC – include YY as well.

Something like

OrderDate BETWEEN @StartDate AND @EndDate
AND SupplierCode = CASE WHEN @SupplierCode = 'ABC' THEN 'YY','ABC' ELSE @SupplierCode END

I know you can’t write this like that – but that’s just what the end result should be.

How can I do this, really?

Thanks for taking out time to read & answer.

Answer 1

Don’t overthink it! You want the supplier code to match the provided value, or the provided value to be ABC and the stored supplier code to be YY.

Try this

AND ([SupplierCode] = @SupplierCode
OR ([SupplierCode] <> @SupplierCode 
    AND @SupplierCode ='ABC' 
    AND [SupplierCode] = 'YY'))