How do I restore a database using flashbacks?

How do I restore a database using flashbacks?

Flashback to the guaranteed restore point

1. $> su – oracle.
2. $> sqlplus / as sysdba;
3. SQL> select current_scn from v$database;
4. SQL> shutdown immediate;
5. SQL> startup mount;
6. SQL> select * from v$restore_point;
7. SQL> flashback database to restore point CLEAN_DB;
8. SQL> alter database open resetlogs;

How does a flashback database work?

Use the FLASHBACK DATABASE command to rewind the database to a target time, SCN, or log sequence number. This command works by undoing changes made by Oracle Database to the data files that exist when you run the command. Flashback can fix logical failures, but not physical failures.

What is guarantee flashback database?

The FLASHBACK DATABASE operation used to return your database to a guaranteed restore point requires the use of archived redo logs from around the time of the restore point. A flash recovery area must be configured, as described in “Setting Up a Flash Recovery Area for RMAN”.

How do you check flashback mode?

Use the following command to check if Flashback Database is enabled for your target database: SELECT FLASHBACK_ON FROM V$DATABASE; To enable Flashback Database: Ensure that you configure a fast recovery area and that the database is running in ARCHIVELOG mode.

What is Flashback point?

The FLASHBACK DATABASE command is a fast alternative to performing an incomplete recovery, also known as a point-in-time recovery (PITR). In order to flashback the database you must have SYSDBA privilege and the flash recovery area must have been prepared in advance.

How do I enable flashbacks in database?

Enabling Flashback Database

1. Ensure the database instance is open or mounted.
2. Optionally, set the DB_FLASHBACK_RETENTION_TARGET to the length of the desired flashback window in minutes: ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320; # 3 days.
3. Enable the Flashback Database feature for the whole database:

How do you use flashbacks in SQL?

To flash back a table to an earlier SCN or timestamp, you must have either the FLASHBACK object privilege on the table or the FLASHBACK ANY TABLE system privilege. In addition, you must have the SELECT , INSERT , DELETE , and ALTER object privileges on the table.

How can you determine if the database is a flashback mode?

How do you flashback a physical standby database?

Flashback to restore point created prior to the opening of the standby database. Convert the physical standby control file from a primary mount back to a standby mount. Startup mount the physical standby. Begin log apply the start the re-synchronisation.