Question

我正在制作报告，其中包括窗口功能。我必须按行对值求和，并按制造商显示总数，但是得到的总和却不同：

select manufacturer, 
  product_code,
  date_code,
  sum(packs),
  sum(packs) over(partition by manufacturer,date_code)
from staging.sales
group by manufacturer, 
  product_code,
  date_code, 
  packs

我认为，这是由于分组组合引起的，但是如果没有它，我会出错。我该如何解决？

谢谢！

Answer 1

使用sum(sum(packs))：

select manufacturer, product_code, date_code,
       sum(packs),
       sum(sum(packs)) over (partition by manufacturer) as manufacturer_sum
from staging.sales
group by manufacturer, product_code, date_code;

但是，如果您仅需要按制造商分类的总数，则可能根本不需要窗口功能

select manufacturer, sum(packs) as manufacturer_sum
from staging.sales
group by manufacturer;

聚合后的窗口功能

1 个答案: