层次结构缩减在Kylin中如何工作

Question

下面的图片说明了层次结构维度缩减的效果。

将长方体的数量从2 ^ N减少到N + 1

通过减少维度，我想知道以下查询如何给出正确答案？

1. 选择B，从X组中按B计数（1）
2. 选择C，从X组中按C计数（1）
3. 从X组中按B，C选择B，C，count（1）

Answer 1

看起来我找到了答案：=>等于

group by A,B => group by A,B
group by B,C => group by C => group by A,B,C
group by A,C => group by C => group by A,B,C
group by A => group by A
group by B => group by A,B
group by C => group by A,B,C
group by B,C => group by A,B,C