MySQL 滚动总和

Question

例如我有波纹管表

 DATE       QUANTITY
9/10/2017     3
9/10/2016     5
9/03/2015     6
9/10/2017     2
8/10/2017     9

我希望最终输出如下所示

YEAR    MONTH   ROLLING SUM   SUM
2015     03          6         6
2016     10          11        5
2017     10          25        14

为了得到总和，我使用下面的代码

SELECT YEAR(Date),MONTH(Date),SUM(QUANTITY) 
FROM table
GROUP BY YEAR(Date),MONTH(Date);

是否可以将 Rollup Sum 添加到同一查询中？

作为第二个注意事项: 目前我正在使用 MySQL，但运行这些查询的最终环境是 AWS Athena。我想知道这两者之间是否有中间地带来测试这些查询。

Answer 1

在大多数数据库中，您可以使用窗口函数:

SELECT YEAR(Date), MONTH(Date), SUM(QUANTITY),
       SUM(SUM(QUANTITY)) OVER (ORDER BY YEAR(DATE), MONTH(DATE) 
FROM table
GROUP BY YEAR(Date),MONTH(Date);

在 MySQL 中，我会推荐相关子查询:

SELECT YEAR(Date), MONTH(Date), SUM(QUANTITY),
       (SELECT SUM(t2.QUANTITY)
        FROM table t2
        WHERE YEAR(t2.Date) < YEAR(t.Date) OR
              (YEAR(t2.Date) = YEAR(t.Date) AND MONTH(t2.Date) <= MONTH(t.date))
       ) as rolling_sum
FROM table t
GROUP BY YEAR(Date), MONTH(Date);