sql中兩個和的最大和

Question

我有桌子：

Bonus     Value

500       1400

1500       177

1800       453

1200       100

800       2500

200         50

780        740

我想打印列的總和，以最大值為准。

我嘗試以下內容：

select 
case when sum(bonus)>sum(Value) then sum(bonus) end
case when sum(Value)>sum(bonus) then sum(Value) end
from emp

但是我沒有得到結果。

錯誤：

Msg 156, Level 15, State 1, Line 3
Incorrect syntax near the keyword 'case'.

Answer 1

您的語法不正確， CASE關鍵字只能使用一次：

select 
  case when sum(bonus)>sum(Value) then sum(bonus)
     else sum(Value) 
  end as MaxSum
from emp

Answer 2

您的case陳述有誤，請嘗試以下一項：

select case when sum(bonus)>sum(Value) then sum(bonus) else sum(Value) end
from emp

Answer 3

其他方式：

SELECT TOP (1) *
FROM
  ( SELECT SUM(Bonus) AS MaxSum, 'Bonus' AS SummedColumn FROM emp
    UNION
    SELECT SUM(Value), 'Value' FROM emp
  ) AS tmp
ORDER BY MaxSum DESC ;

在SQL-Fiddle上測試