Question

我有一个包含OrderDate，TotalAmount的表。我希望显示月份和月份的总量，以及下月的总量。

e.g。

OrderDate    TotalAmount  
----------   -----------  
13.01.1998---     10  
15.01.1998---     11  
01.02.1998---     12  
18.02.1998---     10  
12.03.1998---     09

输出应为

Month     TotalSum  
------    --------  
1---           21  
2---           43  
3---           52

Answer 1

如果您的数据仅来自一个日历年，则可以使用

with g as
( select month(orderdate) as ordermonth,
         sum( totalamount ) as sales
    from orders
    group by month(orderdate)
)
select m.ordermonth, sum(t.sales) as totalsales
  from g as m
  join g as t   on m.ordermonth >= t.ordermonth
  group by m.ordermonth
  order by m.ordermonth

但是，如果您的数据有可能有两年的时间，那么您也需要年份，所以建立您的月份以包括年份。

with g as
( select format(orderdate, 'yyyy-MM') as ordermonth,
         sum( totalamount ) as sales
    from orders
    group by format(orderdate, 'yyyy-MM')
)
select m.ordermonth, sum(t.sales) as totalsales
  from g as m
  join g as t   on m.ordermonth >= t.ordermonth
  group by m.ordermonth
  order by m.ordermonth

使用降压求和对数据进行分组

1 个答案: