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-- Note: COALESCE returns the first nonnull expression among its arguments.
ALTER PROCEDURE [dbo].[MDR_UpdateCurrencyDiscountIndex]
@Currency varchar(3),
@DomesticDiscountIdx varchar(50)= NULL,
@FXDiscountIdx varchar(50) = NULL
AS
BEGIN
BEGIN TRANSACTION
UPDATE CurrenciesMaster
SET
DomesticDiscountIdx = COALESCE(@DomesticDiscountIdx, DomesticDiscountIdx),
FXDiscountIdx = COALESCE(@FXDiscountIdx, FXDiscountIdx)
WHERE Currency = @Currency
if @@ERROR <> 0
BEGIN
ROLLBACK TRANSACTION
RETURN @@ERROR
END
COMMIT TRANSACTION
RETURN 0
END
Using COALESCE
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