From: Weinzierl Stefan <Stefan@Weinzierl-Stefan.de>
To: pgsql-sql@postgresql.org
Subject: Re: ids from grouped rows
Date: Wed, 20 Jul 2005 16:09:23 +0200
Message-ID: <kh22r2-upc.ln1@router.privat> (raw)
In-Reply-To: <e1f838770507200546208a47fc@mail.gmail.com>
References: <e1f838770507200546208a47fc@mail.gmail.com>
Lindsay schrieb:
> Lets say i do this:
>
> SELECT name, MAX(age)
> FROM Person
> GROUP BY name
>
> This will group people who have the same name together, and return the
> highest age for each group. I want to be able to find the id for the
> person with the highest age in each group -
>
> Ideally, it would be something like this
>
> SELECT name, MAX(age), id_for_row_with_max_age
> FROM Person
> GROUP BY name
SELECT name, age, id FROM Person RIGHT JOIN (SELECT name, MAX(age) AS m
FROM Person GROUP BY name) AS t ON (Person.name=t.name AND Person.age=t.m)
Stefan
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To: pgsql-sql@postgresql.org
Cc: Stefan@Weinzierl-Stefan.de
Subject: Re: ids from grouped rows
In-Reply-To: <kh22r2-upc.ln1@router.privat>
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