Oracle Database Administration from Zero to Hero - Managing the Redo Log (Part 2 of 4)

The video tutorial explains the concept of System Change Number (SCN) in databases, its role in tracking changes, and how it is used during normal and abnormal shutdowns. It covers the importance of clean shutdowns for database consistency and the process of instance recovery in Oracle databases, which involves rolling forward and rolling back changes. The tutorial also provides practical guidance on managing redo log files, including creating, relocating, and dropping redo log groups and members.

What does SCN stand for and what is its purpose in a database?

Explain the significance of checkpoint information in a database.

What happens to the SCN number when a database is normally shut down?

Describe the difference between a clean shutdown and an abnormal shutdown of a database.

What is instance recovery and when is it initiated?

What are the two major actions performed during instance recovery?

How does Oracle Database determine which changes to keep and which to roll back during instance recovery?