Question

使用此查询，我需要使用每行的运行总计填充NULL列，其中它对应于当前表的日历年中的付费金额。此运行总计应按member_id分组。

SELECT id=identity(int,1,1), cast(null as numeric(22,3)) as max_running_total, *
INTO #temp
FROM Customer_DB..Sales_Table
ORDER BY Date_Column asc

UPDATE #temp
SET max_running_total = (SELECT SUM(paid_amount)
                         FROM #temp
                         WHERE id <= id
                         GROUP BY member_id)

Answer 1

由于您没有给出架构，我已经采用了一个示例架构，并尝试了滚动总和。您可以使用相同的SQL窗口函数来实现结果

CREATE TABLE amt 
  ( 
     id            INT, 
     paid_amount   DECIMAL, 
     running_total DECIMAL 
  ) 

insert INTO amt VALUES (1, 100, NULL), (2, 50, NULL), (3, 50, NULL) 

SELECT id, paid_amount, 
 SUM(paid_amount) over(ORDER BY id ROWS BETWEEN unbounded preceding AND CURRENT ROW) AS running_total 
FROM amt

SQL运行总计按ID分组

1 个答案: