UFN_GIFTFEEPAYMENTMETHOD_UNIQUE

            create function dbo.UFN_GIFTFEEPAYMENTMETHOD_UNIQUE (@PAYMENTMETHODCODE tinyint) 
            returns bit
            with execute as caller
            as 
            begin
                declare @r as int;
                select @r = count(*) from dbo.GIFTFEEPAYMENTMETHOD where PAYMENTMETHODCODE = @PAYMENTMETHODCODE;

                if @r <= 1 --No others

                    return 1

                return 0
            end