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From: Emi Lu <emilu@encs.concordia.ca>
To: pgsql-sql@postgresql.org
To: " <pgsql-general@postgresql.org>
Subject: Simple way to get missing number
Date: Tue, 24 Apr 2012 10:15:26 -0400
Message-ID: <4F96B57E.8080306@encs.concordia.ca> (raw)

Good morning,

May I know is there a simple sql command which could return missing 
numbers please?

For example,

t1(id integer)

values= 1, 2, 3 .... 5000000

select miss_num(id)
from   t1 ;


Will return:
===============
37, 800, 8001

Thanks a lot!
Emi




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