Question

我尝试在SQL Server中编写公式，以减去两个列的值，这两列是table2的[AmountSpent]列和两个不同表的table1的[Amount]列，并更新余额金额[金额]专栏有什么想法吗？

提前谢谢你......

Answer 1

我认为以下内容将起作用，假设您在两个表之间具有可靠的外键关系

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

Answer 2

我明白了.........感谢@james Osborn

     create procedure SP_Subtraction
      (
       @EmpID int 
       )
      as
      begin
      UPDATE PTS_BalanceTracker
      SET PTS_BalanceTracker.Balance_BalanceAmount = PTS_BalanceTracker.Balance_BalanceAmount - PTS_Transactions.Transaction_Amount
      FROM
      PTS_BalanceTracker INNER JOIN
      PTS_Transactions ON
      PTS_BalanceTracker.Emp_ID = @EmpID
      end

Sql：不同列的减法公式？

2 个答案: