Question

我在表格中有记录，其中包含特定级别的代码和附加到该级别的金额。他们没有加起来，这不是问题。

我希望创建一个查询，按级别代码加上它下面级别的值来汇总所有值。我也想在同一查询中每个级别的金额，但没有必要。我在下面创建了一个示例表和输出。有没有人有这样做的好方法？此外，是否有这种卷起的实际定义？

CREATE TABLE LEVEL_AMOUNTS(
    LEVEL_CODE    char(1)
    AMOUNT        integer
)
INSERT INTO LEVEL_AMOUNTS VALUES
('A',1),('A',1),('A',1),('A',1),
('B',1),('B',1),('B',1),('B',1),
('C',1),('C',1),('C',1),('C',1)

输出：

A | 12
B | 8
C | 4

Answer 1

SQL Server 2008没有累积总和。您可以使用子查询或联接来执行此操作：

with cte as (
      select level_code, sum(amount) as amount
      from amounts
      group by level_code
     )
select level_code,
       (select sum(amount) from cte cte2 where cte.level_code <= cte2.level_code) as cumamount
from cte;

Answer 2

with cte as (
      select distinct level_code
      from level_amounts
     )
select l.level_code, sum(l.amount)
from cte
inner join level_amounts l on l.level_code <= cte.level_code
group by l.level_code

或

select l.level_code, sum(l.amount)
from level_amounts l
inner join (select distinct level_code
            from level_amounts) l1
on l.level_code <= l1.level_code
group by l.level_code;

sqlfiddle

创建累积汇总

2 个答案: