but how do I know that "distinct on" doesn't cut off
the row with max(val2) of that id that I need ?
> see the yesterday's thread about DISTINCT ON (non-standard Postgres
feature)
>
> > I have a problem, which I'm not able to solve with a simple query :
> >
> > I need a resultset with distinct id's, but the max val2 of each id.
> > I tried to group by id, but though I need the pk in my resultset
> > I have to group it too, which "destroys" the group of val2.
>
>
>