有没有办法让 sum window 函数不通过分区逐步求和？

Question

当我尝试对分区求和以获得每个阶段的总和时，它 adds progressively through the rows 代替了分区。

select
        sub_business,
        channel,
        stage,
        time::date                                                                     as time,
        count(session_id)                                                              as count,
        count / lag(count) over (partition by time::date, channel order by count desc) as conversion_rate,
        sum(count) over (partition by stage, time::date order by count)                as total
    from
        loan_dw_test.marketing.uploan_funnel_table
    where
          time::date = '2019-06-21'
      and stage in ('application_view', 'lead')
    group by
        time::date,
        sub_business,
        channel,
        stage
    order by
        time  desc,
        sub_business,
        channel,
        count desc

例如，我希望所有 application_view 行的总数为 57，所有前导行的总数为 62。

Answer 1

为了计算整个分区的总和，您可以跳过 ORDER BY:

SELECT  ...
       ,sum(count) over (partition by stage, time::date)
FROM ...