Oracle Database Administration I ( 1z0-082 Exam )

Each database requires at least one database administrator (DBA) to administer it. Because an Oracle database system can be large and can have many users, often this is not a one-person job. In such cases, there is a group of DBAs who share responsibility.

A database administrator's responsibilities can include the following tasks:

Installing and upgrading the Oracle server and application tools

Allocating system storage and planning future storage requirements for the database system

Creating primary database storage structures (tablespaces) after application developers have designed an application

Creating primary objects (tables, views, indexes) once application developers have designed an application

Modifying the database structure, as necessary, from information given by application developers

Enrolling users and maintaining system security

Ensuring compliance with your Oracle license agreement

Controlling and monitoring user access to the database

Monitoring and optimizing the performance of the database

Planning for backup and recovery of database information

Maintaining archived data on tape

Backing up and restoring the database

Contacting Oracle Corporation for technical support

Security Officers

In some cases, a site assigns one or more security officers to a database. A security officer enrolls users, controls and monitors user access to the database, and maintains system security.

As a DBA, you might not be responsible for these duties if your site has a separate security officer.

Network Administrators

Some sites have one or more network administrators. A network administrator can administer Oracle networking products, such as Oracle Net Services.

See Also:

Part VI, "Distributed Database Management" for information on network administration in a distributed environment

Application Developers

Application developers design and implement database applications. Their responsibilities include the following tasks:

Designing and developing the database application

Designing the database structure for an application

Estimating storage requirements for an application

Specifying modifications of the database structure for an application

Relaying the above information to a database administrator

Tuning the application during development

Establishing an application's security measures during development

Application developers can perform some of these tasks in collaboration with DBAs.

Application Administrators

An Oracle site can assign one or more application administrators to administrate a particular application. Each application can have its own administrator.

Database Users

Database users interact with the database through applications or utilities. A typical user's responsibilities include the following tasks:

Entering, modifying, and deleting data, where permitted

Generating reports from the data

Tasks of a Database Administrator

The following tasks present a prioritized approach for designing, implementing, and maintaining an Oracle Database:

Task 1: Evaluate the Database Server Hardware

Task 2: Install the Oracle Software

Task 3: Plan the Database

Task 4: Create and Open the Database

Task 5: Back Up the Database

Task 6: Enroll System Users

Task 7: Implement the Database Design

Task 8: Back Up the Fully Functional Database

Task 9: Tune Database Performance

These tasks are discussed in succeeding sections.