Question about database, copy from 1 listing field to another

Hello guys,

Is there anyway if I can copy value of a listing field from a category, to a new listing field in the same category?
For example I have listing field "price" I been using for all categories for sale, for rent, booking real estate. Including "rental_car", now I create a new listing field "rental_price," can I copy value from listing field "price" to "rental_price" within the same category "rental_car"?

I think it would be better to create a new ticket with a request. My co-workers will help you solve it.