Kindly guide on how can we generate reports for employee data base.

one way to pull all data is from User manager. Here you can do:

docs.uknowva.com/how-to/general/107-how-...all-users-in-uknowva

Else, we have a reporting engine too which helps you create custom reports , but this feature is available only for paid customers. If you are a paid customer, you may write to support team for enabling it