How to calculate data when Oracle flashes back one week ago?

Yes, Oracle Flash Recovery feature can restore the database to a specific point in time, including data from a week ago. The specific steps are as follows: Determine the recovery point. Enable flashback logging. Create a flashback database. Open Flashback Database. Use the FLASHBACK TABLE command to restore data from one week ago. Commit the changes to complete the recovery.

How to use Oracle flashback to recover data from a week ago

Oracle flashback function is a powerful tool , allowing users to restore the database to a specific point in time. Using this feature, you can recover data from a week ago.

To flashback the database:

Step 1: Determine the recovery point

First, determine the point in time you want to restore to. Typically, you can use Oracle Flashback Query to view this point in time.

Step 2: Enable flashback logging

Make sure flashback logging is enabled. You can use the following command:

ALTER DATABASE FLASHBACK ON;

Step 3: Create a flashback database

Use the following command to create a flashback database:

CREATE FLASHBACK DATABASE TO RENAME NAME AS flashback_name;

whereflashback_nameis the name of the new database.

Step 4: Open the flashback database

Open the created flashback database:

ALTER DATABASE flashback_name OPEN;

Step 5: Recover data

Use the following command to restore data from one week ago:

FLASHBACK TABLE table_name TO TIMESTAMP SYSDATE - INTERVAL '1 WEEK';

wheretable_nameis the data table to be restored.

Step 6: Commit changes

Finally, commit the changes in the flashback database:

COMMIT;

Tip:

• Before performing a flashback operation, the flashback log must be enabled.
• Flashback Database is a read-only database.
• The recovered data will overwrite any changes made since the flashback time point.

The above is the detailed content of How to calculate data when Oracle flashes back one week ago?. For more information, please follow other related articles on the PHP Chinese website!