Creata a Button that move table and sub-tables

Hi everyone,
I need HEPL to know how to create a button to move a customer from the "opportunità" table to the "prenotazioni" table (which is the exact copy as structure)

In the "Opportunity" table I have fields like "Name" "Email" "Phone" etc.
In the Rooms sub-table I have fields like "n ° rooms" "typology" "n ° adults" "price" etc.

Same thing for the "V.Facile" subtable

My problem is to create a button that moves from table "Oopportunità" to "Prenotazioni"
Attention, the Rooms sub-table contains more than one record (a customer wants more rooms configured in different majors)

ho bisogno di aiuto, grazie