Store date without time in oracle

Question

I have a table in oracle DB that contains data the payment date look like this :

Payment table :
field_date
11.03.2014 00:00:00
20.03.2014 00:00:00

I want to remove time (00:00:00), but stay keep type of data. to do that : 1. I have create new table with name xyz table.

create table xyz (date_1 date)

2. Insert contains of payment table to xyz table

    insert into xyz select field_date from payment;

or

insert into xyz select trunc(field_date) from payment;

After to do that, field date_1 on xyz table stay contain time. how to do that?