分组PostgreSQL运行的总结果

我正试图得到2家商店的运行总数。我所做的查询将两个存储区的运行总数加在一起。如何更改查询以分别获取每个商店的运行总数？下面是我的问题。可以找到数据库

这是我得到的结果：

store id       amont      sum
1              5.99       5.99 
1              0.99       6.98 
1              9.99       16.97 
1              4.99       21.96 
2              2.99       24.95 
1              4.99       29.94 
1              0.99       30.93 
1              3.99       34.92 

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在中按存储id使用分区

sum(amount) over (partition by store_id order by store_id, rental_date)

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如果你想把它们放在不同的列中，你可以这样做

select
  store_id,
  amount,
  sum(case when store_id = 1 then amount else 0 end) over (order by rental_date) as store1_sum,
  sum(case when store_id = 2 then amount else 0 end) over (order by rental_date) as store2_sum,
from payment
join rental on payment.rental_id=rental.rental_id
join store  on payment.customer_id=store.store_id

对于不同的行，可以分区为@BarbarosÖzhan

select
  store_id,
  amount,
  sum(case when store_id = 1 then amount else 0 end) over (order by rental_date) as store1_sum,
  sum(case when store_id = 2 then amount else 0 end) over (order by rental_date) as store2_sum,
from payment
join rental on payment.rental_id=rental.rental_id
join store  on payment.customer_id=store.store_id