我正在嘗試計算 Presto/Athena 每一行的累積百分比。例如：如果我有這樣的資料
AccountID | UserID | HolidaysTaken
ABC | A | 4
ABC | B | 6
ABC | B | 3
ABC | K | 2
ABC | K | 3
ABC | X | 1
現在運行此查詢后，我得到以下結果。
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：每個用戶休假占總假期的百分比。
CumulativePercentage：EachUserPercentage 的累計和。這個我可以用這篇文章做
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
我嘗試了差異視窗功能，percent_rank(), cume_dist() and ntile()但無法正常EachUserPercentage作業。
uj5u.com熱心網友回復：
您可以使用視窗函式來查找 AccountID 的百分比，然后使用另一個視窗函式將其與之前未系結的行相加，按每個 UserID 占用的總假期排序。類似如下：
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;
uj5u.com熱心網友回復：
嗨，如果您的組在 AccountID（考慮）上，您可以從下面的查詢中簡單地獲得 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
它在我的最后作業。
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