Question

假设我有一个包含用户订阅条款的表，例如：

user    product    value    start_date    end_date
Scott   T23K       250      15/01/2014    15/02/2015
Tiger   T23K       200      05/01/2014    05/02/2015
Scott   T00Z       20       10/01/2014    02/02/2015
...

我想根据我的结算周期（每月）制作收入报告，如下所示：

month       product    value
Jan/2014    T23K       275
Jan/2014    T00Z       19.1
Feb/2014    T23K       275
Feb/2014    T00Z       0.9

我想我可以查询like this，不过我想知道是否有一个聪明的分析函数或某些东西可以使它看起来更好。想法？

我正在使用Oracle 11gR2

Answer 1

试试这个，我觉得它符合你的情况：

with subscriptions as
(
select 'Scott'  user_,  'T23K'  product ,    '250'  value ,    to_date('15/01/2014','DD/MM/YYYY') start_date ,  to_date('15/02/2015','DD/MM/YYYY') end_date from dual
union all
select 'Tiger'  user_,  'T23K'  product ,    '200'  value ,    to_date('05/01/2014','DD/MM/YYYY') start_date ,  to_date('05/02/2015','DD/MM/YYYY') end_date from dual
union all
select 'Scott'  user_,  'T00Z'  product ,    '20'  value ,    to_date('10/01/2014','DD/MM/YYYY') start_date ,  to_date('02/02/2014','DD/MM/YYYY') end_date from dual
)
, allMonts as
(select   add_months(to_date('01/01/2010','DD/MM/YYYY'),rownum) myMonth , lag(add_months(to_date('01/01/2010','DD/MM/YYYY'),rownum)) over (order by rownum desc) -add_months(to_date('01/01/2010','DD/MM/YYYY'),rownum) daymonth from dual  CONNECT BY LEVEL <= 100
)
, detail as
(
select  s.*,allMonts.myMonth, end_date-start_date duration, 
        case when trunc(start_date,'MON')=trunc(end_date,'MON') then (end_date-start_date)*value/( end_date-start_date) 
          when trunc(start_date,'MON')=allMonts.myMonth then (add_months(allMonts.myMonth,1) - start_date)*value/( end_date-start_date) 
          when trunc(end_date,'MON')=allMonts.myMonth then (end_date - allMonts.myMonth )*value/( end_date-start_date)   
          else  allMonts.daymonth*value/( end_date-start_date) 
          end value_by_month
from subscriptions s , allMonts
where allMonts.myMonth
between trunc(s.start_date,'MON') and trunc(s.end_date,'MON')+1
)
select myMonth, product, sum(value_by_month)
from detail
group by rollup(myMonth), product

使用Oracle按比例计算价值

1 个答案: