Members of the SDB Operators group can manage databases without belonging to the Administrators or System groups. They have full access to the database resources listed using operating system commands; other operating system users only have read privileges.
All SAP MaxDB versions 7.7 and higher support this group.
It is your responsibility as administrator on your Microsoft Windows system to create the SDB Operators group before installing SAP MaxDB.
The database installation program then allocates the required authorizations to the SDB Operators group.
SAP MaxDB Security Guide, Restricting Access to Database Resources (Microsoft Windows)