Subject Re: Re: Re: Re: [firebird-support] Is there any logical difference?
Author liviuslivius
It looks like the issue does not exists.
I have thinked that i compare
but this was really NOT EXISTS AND SOMETHING or EXISTS
and logic table for "NOT EXISTS AND SOMETHING" is:
false and NULL = false 
true and NULL = NULL 
which is now understandable
thank you for your time
Karol Bieniaszewski