From: Ken Hill <ken@scottshill.com>
To: pgsql-sql@postgresql.org
Subject: Non Matching Records in Two Tables
Date: Wed, 08 Feb 2006 13:10:23 -0800
Message-ID: <1139433024.2044.48.camel@localhost.localdomain> (raw)
I need some help with a bit of SQL. I have two tables. I want to find
records in one table that don't match records in another table based on
a common column in the two tables. Both tables have a column named
'key100'. I was trying something like:
SELECT count(*)
FROM table1, table2
WHERE (table1.key100 != table2.key100);
But the query is very slow and I finally just cancel it. Any help is
very much appreciated.
-Ken
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To: pgsql-sql@postgresql.org
Cc: ken@scottshill.com
Subject: Re: Non Matching Records in Two Tables
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