Re: Min and Max

If you do not mind non standard, how about:

SELECT DISTINCT ON(id_father) * FROM children ORDER BY id_father,
child_age;

Dennis Björklund wrote:
>
> On 29 Nov 2002, Sergio Oshiro wrote:
>
> > How can I get the rows of the children name and its "father" such that
> > they have the min child_ages?
> >
> > -- the following does not return the child_name...
> > select id_father, min(child_age) from children group by id_father;
> > select id_father, max(child_age) from children group by id_father;
>
> You could join one of the above with the table itself and get the result.
> Something like
>
> select *
> from ( select id_father, min(child_age)
> from children
> group by id_father) as r,
> children
> where children.id_father = r.id_father
> and children.min = r.min;
>
> --
> /Dennis
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: subscribe and unsubscribe commands go to majordomo(at)postgresql(dot)org