if I have a date field that contains a NULL
will it show up when I ask for a where date range for the same date field.
Where mydate>= "2011/04/01"::date and mydate<= "2011/04/30"::date
With the above where will the NULL's be selected????
I ask because I was always told that a NULL matches everything and nothing!
I think the answer is no.
when mydate is null, record will not be returned.
e.g.,
select 'abc' where (null::date >='2011-01-01'::date) ;
0 rows returned.
Emi
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