The person who is responsible for administrating all of Oracle’s resources on the hard disk drive and allows the user to access these resources is mainly known as Oracle Database Administrator (ODBA).

The ODBA takes care of the followings:

• Updating the database.

• Retrieving information from the database.

• Accepting query languages statement.

• Enforcing security specifications.

• Enforcing data integrity specifications.

• Enforcing transactions consistency.

• Optimizing data sharing.

• Optimizing queries.

• Managing system catalogs.