How to roll back newly deleted data in oracle

Deleted data in Oracle can be recovered in two ways: Undo tablespace: Use the FLASHBACK command to recover data from the undo tablespace that stores a copy of the deleted rows. Data recovery point: Use the RESTORE command to recover data from a copy of the data (recovery point) saved at a specific time in the database.

Recover deleted data in Oracle

How to recover deleted data in Oracle?

Oracle provides two methods to recover deleted data:

1. Use undo tablespace

• Undo The tablespace stores a copy of the deleted rows.
• Data can be recovered by using theFLASHBACKcommand.

2. Use data recovery point

• The data recovery point is a save point in the database that stores a copy of the data at a specific time.
• Data can be restored by using theRESTOREcommand.

Detailed steps:

Recover data using undo tablespace

1. Make sure that the undo tablespace has been Enable.

2. Use the following command to restore data:

   FLASHBACK TABLE table_name TO BEFORE DROP;

   Copy after login

   wheretable_nameis the name of the table to be restored.

Recover data using data recovery points

1. Determine the time to recover the data.

2. Use the following command to restore data:

   RESTORE TABLE table_name TO RECOVERY POINT AS OF 'timestamp';

   Copy after login

   wheretable_nameis the name of the table to be restored,timestampis the time to restore the data .

Note:

• Data recovery usually only works on recently deleted data.
• If the data has been overwritten multiple times, it may not be recoverable.
• It is recommended to back up the database regularly to ensure data security.

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