sql中的sumProduct [英] sumProduct in sql
问题描述
我正在尝试在服务器上的表中实现 sumproduct(来自 excel).
I'm trying implementing sumproduct (from excel) in my table on the server.
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
但这并不完全有效.无法发现错误,也许我只是累了或错过了它.
but this doesn't quite work. Can't spot the error, maybe i'm just tired or missing it.
样本数据和预期结果
只提及重要的列
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:
EDIT2: I need some help with the syntax. I'm trying to rewrite this part:
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
作为
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,但应该像那样工作
Can't get the syntax right, but should work like that
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).如何将 over (partition by a)
合并到上面的代码中?
How could i do this for every date (let's say the date is the column 'a' or whatever name). How can I incorporate over (partition by a)
in the code above?
想要类似的东西
case
when b like 'axr%' then
(sum(c*e)/100*3423 over (partition by a))end as sumProduct
推荐答案
sum-product 的语法在 SQL 中非常简单:
The syntax for a sum-product is very simple in SQL:
select sum(c * e)
from #mytable1;
我不太确定这如何适用于您的查询,其中似乎包含其他逻辑.
I am not quite sure how this applies to your query, which seems to have other logic in it.
你想要一个窗口函数:
select t.*,
sum(c*e) over (partition by a)
from #mytable1;
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