使用 OVER 子句和 PARTITION BY 子句与计数器计算运行总计

【问题标题】：Calculating Running Total with OVER Clause and PARTITION BY Clause with counter使用 OVER 子句和 PARTITION BY 子句与计数器计算运行总计
【发布时间】：2019-02-04 14:27:47
【问题描述】：

如何使用计数器计算每个 week_number 和 user_name 的总和？我用sum() OVER (PARTITION BY ORDER BY )

我希望最大总和为 10。
我该怎么做？

这是我的原始表格：

这是我想要得到的结果：

这里是sql代码：

SELECT week_number,
user_name,
sum(points) OVER (PARTITION BY user_name ORDER BY week_number) AS total_prime
FROM team;

【问题讨论】：

标签： sql postgresql sum window-functions

【解决方案1】：

试试这个

select 
  week_number, 
  user_name, 
  points, 
  case when total_prime > 10 then 10 else total_prime end as sum, 
  case when total_prime > 1 and total_prime < 10 then null 
       when total_prime > 10 then total_prime - 10 end as dif
from
  (select 
     week_number, 
     user_name, points, 
     sum(points) over (partition by user_name order by week_number) as total_prime 
   from 
     team) a

我没有在你的第二张桌子上找到它，alan 有point 4 但有sum 2。

【讨论】：