无法汇总列

Question

我完全对sql查询的输出感到困惑。这是我的SQL：

SELECT 
    PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, ORIGINAL_QUANTITY, 
    SUM(MySum) Orig_Qty
FROM
    Test 
GROUP BY
    PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, ORIGINAL_QUANTITY

此查询不求和并返回单行。我希望Orig_Qty是340。

这里是SQL Fiddle

我期望以下输出：

Answer 1

ORIGINAL_QUANTITY在这两行之间有所不同，这就是为什么您没有得到340的原因。使用这个：

SELECT PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, SUM(MySum) Orig_Qty
from Test r 
Group by PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION

Answer 2

使用子查询

select sum(Orig_Qty) q from
    (SELECT PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, ORIGINAL_QUANTITY, SUM(MySum) Orig_Qty
    from Test r 
    Group by PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, ORIGINAL_QUANTITY
    ) a

或仅需使用数量即可使用

SELECT  SUM(MySum) Orig_Qty
from Test r 

如果需要所有列的总和，则使用窗口函数

SELECT distinct PROJECT_ID, ACTIVITY_RUB4, CALCULATION_VERSION, 
SUM(MySum) over() Orig_Qty
from Test r 

PROJECT_ID  ACTIVITY_RUB4   CALCULATION_VERSION     Orig_Qty
36002       12.C01-01-RP       V001                  340