Re: Useful Oracle books - C.J. Date theory vs. practicality

Jared.Still@xxxxxxxxxxx allegedly said,on 29/05/2004 5:23 AM:

Maybe I need a slug of Ardberg to understand. 

You forgot that PL/SQL, unlike Cobol, has a NULL.
If the value being compared is NULL, you get a meaningless
result that still executes something in PL/SQL.  While in
Cobol it simply can't exist therefore the problem
is never seen: there is no such thing as a NULL in ANY
data type in Cobol  (last time I looked, anyway).

--
Cheers
Nuno Souto
in sunny Sydney, Australia
dbvision@xxxxxxxxxxxxxxx
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