From: Matt Emmerton <matt@gsicomp.on.ca>
To: Russell Simpkins <russellsimpkins@hotmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: Help with multistage query
Date: Wed, 7 Sep 2005 17:37:47 -0400
Message-ID: <003001c5b3f4$6a6911b0$1200a8c0@gsicomp.on.ca> (raw)
References: <000001c5b3d5$a67a3540$0300a8c0@dell8200>
<BAY103-DAV13C36CCE265B28F7F39B50B5A60@phx.gbl>
----- Original Message -----
From: Russell Simpkins
To: pgsql-sql@postgresql.org
Sent: Wednesday, September 07, 2005 4:05 PM
Subject: Re: [SQL] Help with multistage query
I have a perl script that issues a series of SQL statements to perform some queries. The script works, but I believe there must be a more elegant way to do this.
The simplified queries look like this:
SELECT id FROM t1 WHERE condition1; ;returns about 2k records which are stored in @idarray
foreach $id (@idarray) {
SELECT x FROM t2 WHERE id=$id; ; each select returns about 100 records which are saved in a perl variable
}
how about
select t1.id from t1, t2 where t1.id = t2.id and t2.id = x
or more correctly, based on the OP's example:
select t2.x from t1, t2 where t1.id = t2.id and t1.id = <condition>
--
Matt
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To: pgsql-sql@postgresql.org
Cc: matt@gsicomp.on.ca, russellsimpkins@hotmail.com
Subject: Re: Help with multistage query
In-Reply-To: <003001c5b3f4$6a6911b0$1200a8c0@gsicomp.on.ca>
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