How to mass purge Learning Completion of Terminated Workers

Summary:

Hello Community!

My client need to mass delete voluntary course completion of Terminated Workers after 30 month from the termination date.

So, my question is:

1. There is the possibility to purge the learning completion of terminated worker?
2. is possible to decide which completion delete and which leave on database (compliance mandatory curse completion)

I know that in Oracle exist a purge process but i cannot see Learning Data from the list of Employee attributes that can be purged.

Client request, infact, is to purge learning completion without impact on Employee biographical data.

Thank you for your attention.

Regards,

Luca