Question

I just Started working with SQL Server and I want to set one column of my table based on another column(automatically and both columns are in a same table). I’ve wrote a function like this:

ALTER FUNCTION [dbo].[FloorNameConvertor] 
(
    @Number int
)    
RETURNS nchar(10) 
AS
BEGIN
RETURN 
(       CASE 
            WHEN @Number/100=1 THEN 'x'
            WHEN @Number/100=2 THEN 'y'
            ELSE 'w'
        END 
)
END

and I use it in default value of my column properties. I have problem to send a value of the cell as a parameter ( I can’t select one cell )?

Thanks

Answer 1

You cannot use other column names in default constraints. You can work it around with INSTEAD OF INSERT trigger or use computed column (not persisted though).