Software Applications Programming Errors and solutions.

@AMTNUMERIC(9,2)=NULL, @TAX NUMERIC(9,2)=NULL, @DISCNUMERIC(9,2)=NULL, @G_TOTAL NUMERIC(9,2)=NULL ) AS SELECT @TOT_AMOUNT=SUM(AMOUNT) FROM TRANS WHERE TNO=@CNO SELECT @TAX=ISNULL(SUM(TAX_A),0) FROM TAX WHERE NO=@TCNO SELECT @TOT_DISC_A=ISNULL(SUM(DISC_A),0) FROM DISCOUNT WHERE NO=@CNO SET @G_TOTAL = (@AMT- @TOT_DISC_A) + @TAX UPDATE FOOT SET SUBTOTAL=@TOT_AMOUNT,TAX=@TAX,DISCOUNT=@TOT_DISC_A,G_TOTAL=@G_TOTAL WHERE CNO=@CNO