达到阈值后将滚动总和重置为0

Question

我正在尝试计算运行总计，并根据2种情况或达到限制将其重置为0。

这里是一个例子。

如上图所示，我需要在满足以下条件的情况下获得运行总计：

1. 每月折扣= 0，月票== 1

   如果Discount = 1和Ticket = 0之一，则下一个运行总计的值必须为0。

2. running_total <50

   如果运行总计> = 50，则运行总计的值必须从同一行的值开始。

这就是我现在想要做的：

在HIVE中是否有可能这样做？非常感谢！！！

TextInput

Answer 1

您的报告中根本没有考虑到40、60和20的事项吗？就像您希望对它们进行计数，然后添加新行（总计0来重新启动）一样？

Answer 2

这是我设法做到的方式：

SELECT *,
       SUM(case when month_disc=1 OR month_ticket=0 then 0 else value end) OVER (PARTITION BY account, flg_sum, band_sum ORDER BY date ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS running_sum
 FROM (
    SELECT *,
           FLOOR(SUM(case when month_disc=1 OR month_ticket=0 then 0 else value end) OVER (PARTITION BY account, flg_sum ORDER BY date ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)/50.000001) as band_sum ---- create bands for running total
 FROM (
    SELECT *,
          SUM(tag_flg) OVER (PARTITION BY account ORDER BY date ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS flg_sum
 FROM (
    SELECT *,
          CASE WHEN  (month_disc=1 OR month_ticket=0) THEN 1 ELSE 0 END AS tag_flg ---- flag to count when the value is reset due to one of the conditions
    FROM source_table) x ) y) z