Oracle APEX includes two different types of administrators: Workspace administrators and Instance administrators.
To access the APEX development environment, users sign in to a shared work area called a workspace. Workspace administrators are users who perform administrator tasks specific to a workspace such as managing user accounts, monitoring workspace activity, and viewing log files. Instance administrators are superusers that manage an entire hosted instance using the APEX Administration Services application.
The role of Instance administrator is not available in Oracle Database Cloud Service (Database Schema).