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 DBAs 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

Oracle数据库用户之 : 数据库管理员
数据库管理员的职责
1. 安装升级数据库
2. 分配及计划系统存储空间
3. 备份恢复数据库
...