How to recover a table dropped in Oracle.

In Oracle, when using the DROP TABLE command to delete a table, both the data and structure of the table will be permanently removed and cannot be directly recovered. Therefore, before deleting a table, it is important to make sure that important data has been backed up or to use other means of recovery.

Here are some possible methods of recovery:

1. Using a database backup: If you have backed up the database before deleting the table, you can restore the table by reverting the backup to the state before the table was deleted.
2. By using a rollback segment: If you enable a rollback segment before deleting a table and do not execute a COMMIT statement after deleting the table, you can use the rollback segment to undo the deletion operation. Here are the specific steps:
3. Use the UNDO command to locate the transaction ID preceding the deletion of the table.
4. Use the FLASHBACK TABLE command to restore a table to a specific transaction ID.
5. By using flashback technology: If you enabled flashback technology before deleting a table, you can use flashback table to recover the table. Here are the specific steps:
6. Restore the table to its state before deletion using the FLASHBACK TABLE command.

It is important to note that the above methods are only applicable in specific situations and require appropriate settings and preparations before deleting the table. Therefore, exercise caution when performing table operations and ensure proper backups and data protection measures have been taken.