Query builder. The number of drawings for each user

Try to use these article https://www.ptc.com/it/support/article/CS281820

If you want to know the number of documents for each user, you have to add related table to above report

Do you need the number of drawings created by each user during some time period or the number revised / checked in by users?  Windchill considers it a "Create" activity to Revise for example B.2 to arrive at new C.1.

Given just a bit more info, I can create this report for you.