Database Administration Questions

UPDATE and DELETE Restrict - A referential integrity rule that disallows the update or deletion of referenced data. DELETE Cascade - When a referenced row is deleted all associated dependent rows are deleted.

- Installing and upgrading the Oracle Server and application tools.

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

- Managing primary database structures (tablespaces)

- Managing primary objects (table, views, indexes)

- Enrolling users and maintaining system security.

- Ensuring compliance with 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.

- Maintain archived data on tape

- Backing up and restoring the database.

- Contacting Oracle Corporation for technical support.

A Control file records the physical structure of the database. It contains the following information. Database Name ,Names and locations of a database’s files and redolog files. Time stamp of database creation.

ALTER DATABASE DATAFILE <datafile_name> RESIZE <new_size>; 

You get this error when you get a snapshot too old within rollback. It can usually be solved by increasing the undo retention or increasing the size of rollbacks. You should also look at the logic involved in the application getting the error message.

SQL * DBA - This allows DBA to monitor and control an ORACLE database. SQL * Loader - It loads data from standard operating system files (Flat files) into ORACLE database tables. Export (EXP) and Import (imp) utilities allow you to move existing data in ORACLE format to and from ORACLE database.

ALTER TABLESPACE ADD DATAFILE <datafile_name> SIZE <size>

ALTER SYSTEM SWITCH LOGFILE;