There's a number of ways you can do this. The simplest, if you don't want
to change the underlying data in you table, is to use a calculated field in
your query, such as:
DateOnly: DateValue([NameOfYourExistingDateTimeField])
If you really want to get rid of the time component from your data, you can
run an update query using this expression, such as:
UPDATE YourTableName SET NameOfYourExistingDateTimeField =
DateValue([NameOfYourExistingDateTimeField]);
Doing this means that you will lose the time information forever. But
that's your call ;-)
HTH,
Rob