Oracle SQL添加colum，其中总计按其他字段分组

Question

我有这个结果

ZONE    SITE    BRAND    VALUE
north    a      a_brand1    10
north    a      a_brand2    15
north    a      a_brand3    27
south    b      b_brand1    17
south    b      b_brand2    5
south    b      b_brand3    56

有没有办法按区域和站点分组的总和添加列？像这样：总站点a = 10 + 15 + 27 = 52，总站点b = 17 + 5 + 56 = 78

ZONE    SITE    BRAND    VALUE    TOTAL_IN_SITE
north    a      a_brand1    10         52
north    a      a_brand2    15         52
north    a      a_brand3    27         52
south    b      b_brand1    17         78
south    b      b_brand2    5          78
south    b      b_brand3    56         78

感谢。

Answer 1

使用sum窗口功能。

select t.*,sum(val) over(partition by zone,site) 
from tbl t