Comparing dates

Hello,

I've a SELECT statement on many joined Tabled and one of them has
a date column called 'date_date'. When I fetch a date e.g.
'02-03-2001', I get, say, 60 results back. When I now perform the
same query with another date, lets take '03-03-2001', I get back
about 70 results.

When I now modify my query to get both results in one I write

SELECT
....
FROM
..
AND
date_date >= '2001-03-02'
AND
date_date <= '2001-03-03'
AND
....

I think I should get back the rows for both days, 60 + 70 makes
130 to me. But what I get back is even smaller then 60. I
allready tried TO_DATE conversion, an OR construct but always
the same result.

Is there something special to know when comparing/working with
date-datetypes ?

kind regards,
Markus

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Markus Fischer, http://josefine.ben.tuwien.ac.at/~mfischer/
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