每条记录的运行总百分比占总和。 Presto/雅典娜/SQL答案

【问题标题】：Running total percentage per record over total sum. Presto/Athena/SQL每条记录的运行总百分比占总和。 Presto/雅典娜/SQL
【发布时间】：2021-12-06 10:25:33
【问题描述】：

我正在尝试计算每行 Presto/Athena 的累积百分比。例如：如果我有这样的数据

AccountID | UserID | HolidaysTaken
ABC       | A      | 4
ABC       | B      | 6
ABC       | B      | 3
ABC       | K      | 2
ABC       | K      | 3
ABC       | X      | 1

现在运行此查询后，我得到以下结果。

SELECT AccountID, UserID, sum(HolidaysTaken) AS HolidaysTaken FROM table
WHERE AccountID = 'ABC'
GROUP BY AccountID, UserID
ORDER BY HolidaysTaken DESC

AccountID | UserID | HolidaysTaken 
ABC       | B      | 9             
ABC       | K      | 5             
ABC       | A      | 4             
ABC       | X      | 1 

Total holiday taken by all users = 19

但我想再添加 2 列。 EachUserPercentage：每个用户的假期占总假期的百分比。 CumulativePercentage：EachUserPercentage 的累计值。这个我可以使用this post

AccountID | UserID | HolidaysTaken | EachUserPercentage | CumulativePercentage
ABC       | B      | 9             | 47.36              | 47.36  
ABC       | K      | 5             | 26.31              | 73.67
ABC       | A      | 4             | 21.05              | 94.72
ABC       | X      | 1             | 5.26               | 100

我尝试了差异窗口函数percent_rank(), cume_dist() and ntile()，但无法正常工作EachUserPercentage。

【问题讨论】：

标签： sql amazon-athena presto

【解决方案1】：

您可以使用窗口函数来查找 AccountID 的百分比，然后使用另一个窗口函数来对未绑定的行求和，然后按每个 UserID 的总假期数排序。如下所示：

WITH totalUser
AS (SELECT   AccountID
            ,UserID
            ,SUM(HolidaysTaken) AS HolidaysTaken
            ,CAST(100.0 * SUM(HolidaysTaken) / SUM(SUM(HolidaysTaken)) OVER (PARTITION BY AccountID) AS NUMERIC(5, 2)) AS EachUserPercentage
    FROM     table
    WHERE    AccountID = 'ABC'
    GROUP BY AccountID
            ,UserID)
SELECT   totalUser.AccountID
        ,totalUser.UserID
        ,totalUser.HolidaysTaken
        ,totalUser.EachUserPercentage
        ,SUM(totalUser.EachUserPercentage) OVER (PARTITION BY totalUser.AccountID
                                                 ORDER BY totalUser.EachUserPercentage DESC
                                                 ROWS UNBOUNDED PRECEDING)
FROM     totalUser
ORDER BY totalUser.HolidaysTaken DESC;

【讨论】：

你是对的@MatBailie。我已经进行了相应的编辑！谢谢
演示：dbfiddle.uk/…

【解决方案2】：

您好，如果您的群组在 AccountID（已考虑）上，您可以从以下查询中简单地获取 EachUserPercentage。

SELECT table.AccountID, UserID, sum(table.HolidaysTaken) AS HolidaysTaken,
MAX(CAST(all_sum.HolidaysTaken AS NUMERIC(12,2))),
(SUM(CAST(table.HolidaysTaken AS NUMERIC(12,2)))/MAX(CAST(all_sum.HolidaysTaken AS NUMERIC(12,2))))*100 EachUserPercentage
 FROM table
LEFT OUTER JOIN (SELECT SUM(HolidaysTaken) AS HolidaysTaken,AccountID FROM table GROUP BY AccountID)all_sum ON all_sum.AccountID= table.AccountID
WHERE table.AccountID = 'ABC'
GROUP BY table.AccountID, UserID
ORDER BY HolidaysTaken DESC

它对我有用。

【讨论】：