Abstract: In this paper, many tasks and responsibilities that every database administrator should and must do in order to get the perfect result for their database. There are similarity between SQL server identity, oracle identities and other database identities such as MySQL, and Microsoft SQL Server. With the 11g release the tuning advisorís technology has been fully automated so that some SQL performance problems can be fixed automatically by the system.

Keywords: Database, SQL, Oracle, Administrators, Roles.