How to use sum?

[umanusorn]

I want to use groupBy and sum together

[BoD]

There is a groupBy method in the AbstractSelection class (that all Selection classes extend).

[umanusorn]

Yes I already use group by, its working well. However, I also want to sum value too. e.g.

name price a 3 a 2 b 4

I want name price a 5 b 4

but only GroupBy I got name price a 3 b 4

[BoD]

I'd have to see your code, but basically you simply need to have "sum(price)" in your selection.