sql - 如何在 SQL Server 2005 中查找表中多列的总和？

Question

我有一个表Emp，其中包含以下行:

Emp_cd | Val1  | Val2  | Val3  | Total
-------+-------+-------+-------+-------
 1     | 1.23  | 2.23  | 3.43  | 
 2     | 23.03 | 12.23 | 2.92  |
 3     | 7.23  | 9.05  | 13.43 |
 4     | 03.21 | 78.23 | 9.43  |

我想查找 Val1、Val2、Val3 的 SUM，并将其显示在 Total 列中。

Answer 1

简单:

SELECT 
   Val1,
   Val2,
   Val3,
   (Val1 + Val2 + Val3) as 'Total'
FROM Emp

或者如果您只想要一行:

SELECT 
   SUM(Val1) as 'Val1',
   SUM(Val2) as 'Val2',
   SUM(Val3) as 'Val3',
   (SUM(Val1) + SUM(Val2) + SUM(Val3)) as 'Total'
FROM Emp