Terminating a workspace service removes all data, database objects, database schemas, tablespaces, applications, scripts, and files from the current Oracle Application Express instance.
To submit a request to the Oracle Application Express administrator to terminate workspace service:
Navigate to the Workspace home page.
Click Manage Services on the Administration list.
The Manage Services page appears.
Under Workspace, click Request Service Termination.
Click the Request Termination button.
Confirm your request by clicking Terminate Service.