Copy data from PD to PY for testing

Hi.

What is the best way to copy a set of records from related tables from PD to PY ?

For example, we are implementing some new features which needs extensive testing. So instead of entering data one by one in PY, we need to export, for example, all sales orders for the last month to PY and do the testing. The benefit is that we can save a lot of time and all the business scenarios will be tested.