Question

我想在视图中添加一列，以保持Value列的运行总计。当Cat A或Cat B在行中发生变化时，此列必须重置运行总计。所以输出数据必须是这样的： -

CAT A  CAT B    Value   Running Total
=====  =====    =====   =============
0        1       15 
0        1       235 
0        1       306      556
0        0        
1        2       85        85
1        1       105      105 
0        2       600
0        2       70       670
0        3       564
0        3       101      665
0        1       30        30

Answer 1

首先，您需要一个列来指定运行总和的顺序。我将假设这被称为id。

其次，您似乎有某些逻辑在某些行上没有值。目前尚不清楚这种逻辑是什么。适当的＆＃34;运行总和＆＃34;将在所有行上定义。

然后，您可以使用lag()和sum()来定义群组并使用＆＃34; analytic＆＃34; sum()用于运行总和：

select t.cata, t.catb, t.value,
       sum(value) over (partition by grp order by id) as runningsum
from (select t.*,
             sum(case when cata = prev_cata and catb = prev_catb then 0
                      else 1
                  end) over (order by id) as grp
      from (select t.*, lag(cata) over (order by id) as prev_cata,
                   lag(catb) over (order by id) as prev_catb
            from t
           ) t
     ) t;

使用Oracle Analytics更改任一列值时重置运行总计

1 个答案: