SQL Query to mass delete PC, users

[Andy.N]

I recently back up my site to a private server where it can only be accessible by members of a custom usergroup X.
I have manually removed all threads from the public area.
I'd like to remove all PC that started and received by the date that we migrate our servers.

Would like to delete users that belong to the Registered usergroup as well.

Thanks

 

[Jake Bunce]

Delete all PMs:

http://xenforo.com/community/threads/imported-conversations.12467/#post-164602

There is no good way to mass delete users.