Oracle - Group by Cube - 由不同的列汇总

Question

样本数据:

product_type |segment_type  |promotion_id  |promotion_value
-----------------------------------------------------------
Beer         |Regional      |1             |20
Beer         |National      |1             |20
Beer         |Regional      |2             |20
Beer         |National      |2             |20
Beer         |National      |3             |30
Beer         |Regional      |4             |40
Soda         |Regional      |5             |50
Soda         |National      |5             |50
Soda         |Regional      |6             |50
Soda         |National      |6             |50
Soda         |National      |7             |15
Soda         |Regional      |8             |20

目标:获取按product_type和segment_type(多维数据集)分组的总促销价值,考虑不同的促销活动.请注意,单个促销可以到达一个或两个细分(区域和国家).

期望的结果:

product_type   |segment_type    |promotion_value
-------------------------------------------------
Beer           |                |110
Beer           |Regional        |80
Beer           |National        |70
Soda           |                |135
Soda           |Regional        |120
Soda           |National        |115

我目前的SQL如下:

SELECT product_Type,
       segment_type,
       sum(promotion_value)promotion_value
  from sample_data
 group by product_type,
          cube(segment_type)

目前的结果是:

product_type   |segment_type    |promotion_value
-------------------------------------------------
Beer           |                |150
Beer           |Regional        |80
Beer           |National        |70
Soda           |                |235
Soda           |Regional        |120
Soda           |National        |115

SQLFiddle:链接

有没有办法达到预期的效果？

Answer 1

用于Sum(Distinct..)获取组中唯一值的总和

SELECT product_Type,
       segment_type,
       sum(distinct promotion_value)promotion_value
  from sample_data
 group by product_type,
          cube(segment_type)
          order by product_type

SQLFIDDLE演示

更新 ：

SELECT product_Type,
       segment_type,
       Sum(DISTINCT promotion_value)
FROM   (SELECT product_Type,
               segment_type,
               Sum(promotion_value) promotion_value
        FROM   sample_data
        GROUP  BY product_type,
                  segment_type) a
GROUP  BY product_type,
          cube( segment_type ) 

SQLFIDDLE演示