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Re: wired behaviour

From: Shane Ambler <pgsql(at)Sheeky(dot)Biz>
To: Lutz Steinborn <l(dot)steinborn(at)4c-ag(dot)de>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: wired behaviour
Date: 2008-11-28 15:09:34
Message-ID: 493009AE.9090308@Sheeky.Biz (view raw, whole thread or download thread mbox)
Lists: pgsql-sql
Lutz Steinborn wrote:
> Hello Paul,
> thanks for the quick answer.
>> NULL values?
> Jepp, thats it.
> I've supposed this but can't believe it. So NULL is something out of this
> dimension :-)
> Kindly regards
> Lutz

NULL refers to an unknown value - it cannot be said to equal or not 
equal anything other than NULL

It is a concept that catches those new to databases (and sometimes not 
so new).


Shane Ambler
pgSQL (at) Sheeky (dot) Biz

Get Sheeky @ http://Sheeky.Biz

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