我使用一个名为“avg_rev”的窗口函数创建了一个列,它给出了过去7天按销售地区列出的平均收入金额,使用:
AVG(rev) OVER (PARTITION BY sales_region ROWS BETWEEN 7 PRECEDING AND CURRENT ROW) AS avg_rev
我想把每个销售地区每天的平均收入加起来。下表:
date | sales_region | rev | avg_rev
---------|--------------|--------|---------
01-23-18 | US East | 192643 | 187463
01-23-18 | US South | 89734 | 90245
01-23-18 | US West | 254867 | 270974
01-24-18 | US East | 168903 | 189245
01-24-18 | US South | 93127 | 90621
01-24-18 | US West | 252075 | 269874
我想要另一列显示每天的总平均收入,方法是将最后3行相加(或以任何其他方式得到相同的结果),以便得到下表:
date | sales_region | rev | avg_rev | total_avg
---------|--------------|--------|---------|-----------
01-23-18 | US East | 192643 | 187463 | 548682
01-23-18 | US South | 89734 | 90245 | 548682
01-23-18 | US West | 254867 | 270974 | 548682
01-24-18 | US East | 168903 | 189245 | 550740
01-24-18 | US South | 93127 | 91621 | 550740
01-24-18 | US West | 252075 | 269874 | 550740
正如你所看到的,平均总收入保持一致,因为他们每天应该有相同的总和。
如果您能提供正确的帮助,我们将不胜感激!
最佳答案
使用SUM
聚合该值,并包含在group by
中选择的所有其他列。
select date,sales_region,rev
,AVG(rev) OVER (PARTITION BY sales_region ROWS BETWEEN 7 PRECEDING AND CURRENT ROW) AS avg_rev
,SUM(AVG(rev)) OVER (PARTITION BY sales_region ROWS BETWEEN 7 PRECEDING AND CURRENT ROW) AS avg_sum
from tbl
group by date,sales_region,rev