sql 中的总和

sumProduct in sql

我正在尝试在服务器上的 table 中实现 sumproduct(来自 excel)。

select * 
into #myTable2
from #myTable1

select
a, 
b,
c,
d,
e,
(
select (c * e)/100*3423) from #myTable1 t1
inner join #myTable t2
on t1.b = t2.b
where b like 'axr%'
) as sumProduct
from #myTable1

但这不太奏效。无法发现错误,也许我只是累了或想念它。

编辑: 示例数据和预期结果

只会提及重要的栏目

c     e    b        a                             sumProduct      
2     4   axr1     2012.03.01                     2*4 + 3*8 
3     8   axr3     2012.03.01                     2*4 + 3*8 
7     5   axr23    2011.01.01                     7*5 + 3*2
3     2   axr34    2011.01.01                     7*5 + 3*2

EDIT2: 我需要一些语法方面的帮助。我正在尝试重写这部分:

select (c * e)/100*3423) from #myTable1 t1
    inner join #myTable t2
    on t1.b = t2.b
    where b like 'axr%'
    ) as sumProduct
    from #myTable1

case
when t.b like 'axr%' then
(sum(t.c * t.e) /100*3234) end as sumProduct from #myTable t

语法不正确,但应该可以这样工作

编辑 3: 让它工作像这样:

case
when b like 'axr%' then
(sum(c*e)/100*3423)end as sumProduct

并在代码末尾

group by  --had an error without this
a,b,c,d,e 

我如何为每个日期执行此操作(假设日期是 'a' 列或任何名称)。 如何在上面的代码中加入 over (partition by a)

想要

case 
when b like 'axr%' then
(sum(c*e)/100*3423 over (partition by a))end as sumProduct

和积的语法在 SQL 中非常简单:

select sum(c * e)
from #mytable1;

我不太确定这如何适用于您的查询,其中似乎有其他逻辑。

编辑:

你想要一个 window 函数:

select t.*,
       sum(c*e) over (partition by a)
from #mytable1;

真诚地,我还没有理解您的代码。但是假设您有两个具有值的表和一个唯一的 Id(用于连接),那么也许我的实现可以帮助您获得灵感:

-- create new DB or point to an existing one
use [test];

CREATE TABLE [dbo].[table1](
    [id] [int] NOT NULL,
    [value] [int] NOT NULL
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[table2](
    [id] [int] NOT NULL,
    [value] [int] NOT NULL
) ON [PRIMARY]
GO

insert into table1 values (1, 5), (2, 10);
insert into table2 values (1, 2), (2, 4);

select sum(P.products) as sumproduct from
(select (t1.value * t2.value) as products from table1 as t1 inner join table2 as t2 on t1.id = t2.id) as P