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trigger

From: "Aftab Alam" <aalam(at)tatashare(dot)com>
To: <pgsql-admin(at)postgresql(dot)org>
Subject: trigger
Date: 2005-11-18 11:16:24
Message-ID: 000701c5ec31$8366c430$ec1010ac@aftabn463 (view raw or flat)
Thread:
Lists: pgsql-admin
Hello,

I want to create a trigger in PostgresSQL

In trigger, Before inserting the record, if data is already in the table,
the trigger fire the mesaage that data is already there, and after that
trigger ckeck for next insert statement.

Pleae help me in this regard , kindly  reply.

Regards,

_____

Aftab Alam

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