How to compare dates in datetime fields in Postgresql?

Question

I have been facing a strange scenario when comparing dates in postgresql(version 9.2.4 in windows).
I have a column in my table say update_date with type \'timestamp w

Answer 1

Use the range type. If the user enter a date:

select *
from table
where
    update_date
    <@
    tsrange('2013-05-03', '2013-05-03'::date + 1, '[)');

If the user enters timestamps then you don't need the ::date + 1 part

http://www.postgresql.org/docs/9.2/static/rangetypes.html

http://www.postgresql.org/docs/9.2/static/functions-range.html