What Is The Purpose Of Redo Log Files?

1.	What Is The Purpose Of Redo Log Files?
Answer» Before Oracle changes data in a datafile it writes these changes to the redo LOG. If something happens to ONE of the datafiles, a backed up datafile can be RESTORED and the redo, that was written since, REPLIED, which brings the datafile to the state it had before it became unavailable. Before Oracle changes data in a datafile it writes these changes to the redo log. If something happens to one of the datafiles, a backed up datafile can be restored and the redo, that was written since, replied, which brings the datafile to the state it had before it became unavailable.

Answer»

Before Oracle changes data in a datafile it writes these changes to the redo LOG. If something happens to ONE of the datafiles, a backed up datafile can be RESTORED and the redo, that was written since, REPLIED, which brings the datafile to the state it had before it became unavailable.

Before Oracle changes data in a datafile it writes these changes to the redo log. If something happens to one of the datafiles, a backed up datafile can be restored and the redo, that was written since, replied, which brings the datafile to the state it had before it became unavailable.

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