Question

我正在尝试对1列的值求和并将其仅按1列分组，但还要显示其他列。

基本上，如果数据看起来像这样：

Column1   Column2 Column3 Column4
----------------------------------
Col1Data0  Test1   Test2      1
Col1Data0  Test1   Test2      3
Col1Data1  Test1   Test2      2
Col1Data1  Test1   Test2      5

查询应输出：

Column1   Column2 Column3 Column4
Col1Data0  Test1   Test2      4
Col1Data0  Test1   Test2      4
Col1Data1  Test1   Test2      7
Col1Data1  Test1   Test2      7

Answer 1

您可以使用SUM窗口功能：

测试数据：

declare @t table (Column1 varchar(10), Column2 varchar(10), Column3 varchar(10), Column4 int)
insert into @t values 
('Col1Data0','Test1','Test2',1),
('Col1Data0','Test1','Test2',3),
('Col1Data1','Test1','Test2',2),
('Col1Data1','Test1','Test2',5)

查询：

SELECT Column1, Column2, Column3, 
    SUM(Column4) OVER (PARTITION BY Column1) AS SumColumn4
FROM @t

返回：

Column1     Column2 Column3 SumColumn4
Col1Data0   Test1   Test2   4
Col1Data0   Test1   Test2   4
Col1Data1   Test1   Test2   7
Col1Data1   Test1   Test2   7

Answer 2

您可以使用子查询获取第1列的总和，并将其加入以获取输出

Select a.Column1,a.Column2,a.Column3,b.summ 
FROM Table a
INNER JOIN (Select column1,sum(Column4) summ from Table group by column1) b
on b.column1 = a.column1

Answer 3

使用标量子查询

select Column1,Column2,Column3,
(
 select sum(Column4) from tablename b 
 where a.Column1=b.Column1 and a.Column2=b.Column2 and a.Column3=b.column3
) as column4
from tablename a

SQL Aggregate函数基于1列并显示其余

3 个答案: