When a transaction modifies the database, Oracle copies the original data before modifying it. The original copy of the modified data is called

Options
- Undone Data
- Archive data
- Redo data
- Undo data

CORRECT ANSWER : Undo data

Discussion Board
Undo data

When a transaction modifies the database, Oracle copies the original data before modifying it. The original copy of the modified data is called Undo data. Undo data provides read consistency, Oracle provides two ways to allocate and manage undo (rollback) space among transactions.

Prajakta Pandit 02-13-2017 11:38 PM

Write your comments


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)


Related Content

Advertisement
 
▲