From: Richard Huxton <dev@archonet.com>
To: calendarw <calendarw@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: How to union table without union statement?
Date: Wed, 28 Feb 2007 11:05:40 +0000
Message-ID: <45E56204.1040202@archonet.com> (raw)
In-Reply-To: <9d91f7aa0702280233r7c91dedav1ddfaffa92877280@mail.gmail.com>
References: <9d91f7aa0702280233r7c91dedav1ddfaffa92877280@mail.gmail.com>
calendarw wrote:
> Hi,
>
> I need to combine 10 tables which contain same table structure and join an
> "other table" to show the latest 200 record, I am join the "other table"
> first and using union statement to select all record now but the collection
> time is super slow, how can I improve the collection speed?
Start by providing the information needed to diagnose the problem.
Post the output of EXPLAIN ANALYSE <query> along with the query SQL and
any table definitions/sizes you think are useful.
--
Richard Huxton
Archonet Ltd
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, calendarw@gmail.com
Subject: Re: How to union table without union statement?
In-Reply-To: <45E56204.1040202@archonet.com>
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