From: Jaime Casanova <systemguards@gmail.com>
To: 林�[鋅 <s9154083@cyut.edu.tw>
Cc: pgsql-sql@postgresql.org
Subject: Re: A SQL Question About distinct, limit, group by, having, aggregate
Date: Wed, 30 Mar 2005 22:01:24 -0500
Message-ID: <c2d9e70e05033019015c554f03@mail.gmail.com> (raw)
In-Reply-To: <20050331022422.M58459@cyut.edu.tw>
References: <20050331022422.M58459@cyut.edu.tw>
On Thu, 31 Mar 2005 10:29:16 +0800, "林�[鋅" <s9154083@cyut.edu.tw> wrote:
> i have a little question, how to get 3 higher score student in every class.
> Data looks like as below
>
> problem:
> id class score
> john a 100
> jenny a 70
> ken a 59
> mary b 85
> jacky b 80
> lily b 70
> kevin b 50
> david b 30
> tina c 85
> tony c 80
> bare c 70
> vivian c 60
> eric c 57
> andy c 50
>
> result:
> id class score
> john a 100
> jenny a 70
> ken a 59
> mary b 85
> jacky b 80
> lily b 70
> tina c 85
> tony c 80
> bare c 70
>
Actually, i don't see any difference between problem and results but maybe
select * from yourTable order by class, score desc
regards,
Jaime Casanova
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To: pgsql-sql@postgresql.org
Cc: systemguards@gmail.com, s9154083@cyut.edu.tw
Subject: Re: A SQL Question About distinct, limit, group by, having, aggregate
In-Reply-To: <c2d9e70e05033019015c554f03@mail.gmail.com>
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