How to move data from one table to another

Hi,

I want to move data from one table to another one for example, i have table PurchTable and i want create another Table PurchTableCopy (Duplicate functionality is not allowed for tables participating in table Inheritance) so I create new table PurchTableCopy and i create all field exists in PurchTable except field recID i create field Id) because in the next i want archive data of this table and there is not possible to archive a field recId

So how i can do to move data from PurchTable to PurchTableCopy knowingthat there can beadding morefieldsin the future.

Thank you