Question

Im trying to write a formula in SQL Server to subtract the values of two columns which are [AmountSpent]column of table2 and [Amount] column of table1of two different tables and update the balance amount in [Amount] column any idea ?

Thank you in advance…

Answer 1

I think the following will work, assuming you have a reliable foreign key relationship between the two tables

UPDATE [table1]
SET [table1].[Amount] = [table1].[Amount] - [table2].[AmountSpent]
FROM
[table1] INNER JOIN
[table2] ON
[table1].[KeyField] = [table2].[KeyField]