如何在窗口函数中使用具有子句过滤 avg？

问题描述

我创建了一个小提琴 http://sqlfiddle.com/#!17/f882b/23。

它有包含姓名、年龄、国家、体重的表格“苏格兰人”。

select name,weight,country,avg(weight) over (order by name) as avg_weight_over_computed
from scots 
-- group by country
having avg_weight_over_computed > 76
order by name

以上不适用于“具有”子句。我想过滤那些 avg_weights > 76。如何做到这一点？

解决方法

在这种情况下，可以将 HAVING 转换为子查询中的 where 子句吗？

SELECT * FROM
(
  select 
    name,weight,country,avg(weight) over (order by name) as avg_weight_over_computed
  from 
      scots 
)
AS X
where 
  avg_weight_over_computed > 76