Обсуждение: distinct with sum

I need to list products from the table of ordered products with ordered quantities. Each product should be there only
oncebut quantity should be a sum from all the same products from the table.
 
I prepared some query but in quantity column I can see only amount from one record. I need to have sum there.

The query:
select distinct on (id_prod) id_prod, id_unit, sum(quantity) as result from products where determinant = false group by
id_prod,id_unit
 

Thanks in advance for your help.

>I need to list products from the table of ordered products with ordered 
>quantities. Each product should be there only once but quantity should be a 
>sum from all the same products from the table.
> I prepared some query but in quantity column I can see only amount from 
> one record. I need to have sum there.
>
> The query:
> select distinct on (id_prod) id_prod, id_unit, sum(quantity) as result 
> from products where determinant = false group by id_prod, id_unit




select id_prod, id_unit, sum(quantity) as result
from products
where determinant = false
group by id_prod, id_unit



Hélder M. Vieira