comparing a date?

How do I compare a date to be equal to a particular day?

For example, here's some dates in the all_users table:

select * from all_users;

USERNAME                          USER_ID CREATED
------------------------------ ---------- ---------
MAB                                   235 20-JUN-06
MPLANCK                               234 20-JUN-06
TBEST                                 233 20-JUN-06

but if I just check for date equality, I don't match any rows:

SQL> select * from all_users where created='20-JUN-06';

no rows selected

This query does the right thing:

select * from all_users where created>'20-JUN-06' and created<'21-JUN-06';

What's the proper way to compare a date column for a particular day, without respect to the time?

Thanks!
Mark

-- 
Mark Harrison
Pixar Animation Studios