Re: select within aggregate?

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От Vortex
Тема Re: select within aggregate?
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Msg-id 20050506104030.3e725437.vortex25@gmx.de
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Ответ на select within aggregate?  (Vortex <vortex25@gmx.de>)
Список pgsql-sql
On Fri, 6 May 2005 13:34:26 +0530
"Ramakrishnan Muralidharan" <ramakrishnanm@pervasive-postgres.com> wrote:

> SELECT abc.remote_host ,  c , abc.request_uri , a.t FROM abc , ( select remote_host , count(*) as c , max( ts ) as t
fromabc group by remote_host ) as a 
 
> where a.remote_host = abc.remote_host and abc.ts = a.t

I thought about this too. But what happens if there are accidentally two
sets with same timestamp in the table? I suppose the outer select would
match both of them. But a DISTINCT should help to avoid this.
Ok, if you think this is the propper way to meet the
requirement i will do so.

Thank you for your answer!

Klaus



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