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