The database system administrator (also called SYSDBA user) is the first database user. This user is created when a database is created. The default name of the database system administrator is DBADMIN, in SAP systems SUPERDBA.
This database system administrator has the most comprehensive rights of all database users. The database system administrator is a database user of class SYSDBA (administrator) and a DBM operator with all DBM server permissions.
Database Administration, Database System Administrator
Database Manager CLI, Managing Database Manager Operators
SQL Reference Manual, Authorization
SAP MaxDB Security Guide, User Administration and Authentication, Authorizations
SAP note 1542818