I have partition the data according to date.

In Hive if i have a EMP table with 5 columns
EMP : name string,
age int,
salary decimal,
loc string,
join_date timestamp.

I want to load the same data in EMP_HISTORY table partition on join_date(only date and avoid timestamp)...
but in my EMP_HISTORY i want 5 columns should appear and join_date column should contain data with date & timestamp but partition should happen only on date(from join_date).
How can i proceed.
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EMP_HISTORY : name string,
age int,
salary decimal,
loc string,
join_date timestamp.
PARTITION BY(join_date only date)..
ultimately i want only 5 columns as per EMP table and partition on date of join_date.