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Check before insert

From: SG Edwards <s0460205(at)sms(dot)ed(dot)ac(dot)uk>
To: pgsql-interfaces(at)postgresql(dot)org
Subject: Check before insert
Date: 2005-03-15 21:07:43
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-interfaces


I have a table as follows:

protein_id | name
___________ ______

P04667      Albumin
P45366      Lactoglobulin

I have a perl script that will insert data into this table from a file
containing a list of protein_id and names. However, I only want to insert
proteins where they are not already present in the database. Is there a way to
do this using an SQL command?



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Subject: Re: Check before insert
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Subject: Re: simple question

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