Overview of Administering an Oracle Database
Here we presents an overview of the environment and tasks of an Oracle Database administrator (DBA). It also discusses DBA security and how you obtain the necessary administrative privileges.
Types of Oracle Database Users
The types of users and their roles and responsibilities depend on the database site. A small site can have one database administrator who administers the database for application developers and users. A very large site can find it necessary to divide the duties of a database administrator among several people and among several areas of specialization.
Each database requires at least one database administrator (DBA). An Oracle Database system can be large and can have many users. Therefore, database administration is sometimes not a one-person job, but a job for a group of BAs who share responsibility.
A database administrator's responsibilities can include the following tasks:
- Installing and upgrading the Oracle Database 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 Oracle license agreements
- 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 for technical support
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. Please refer to Oracle Database Security Guide for information about the duties of security officers.
Some sites have one or more network administrators. A network administrator, for example, administers Oracle networking products, such as Oracle Net Services. Please refer to Oracle Net Services Administrator's Guide for information about the duties of network administrators.
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 this information to a database administrator
- Tuning the application during development
- Establishing security measures for an application during development Application developers can perform some of these tasks in collaboration with DBAs. Please refer to Oracle Database Application Developer's Guide - Fundamentals for information about application development tasks.
An Oracle Database site can assign one or more application administrators to administer a particular application. Each application can have its own administrator.
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