Can a COMMIT be rolled back?

 No, a COMMIT cannot be rolled back in Oracle.

Once a COMMIT is issued, the changes made during the transaction are permanent and cannot be undone by a ROLLBACK.

Why COMMIT Is Irreversible:

Oracle follows the ACID properties of transactions, and COMMIT ensures Durability:

• Once changes are committed:
• They are written to the redo logs.
• The transaction is marked as complete.
• Undo data is eventually discarded or overwritten.
• A new transaction begins implicitly.

 You cannot:

• Roll back a committed transaction.
• Use ROLLBACK to undo changes after a COMMIT.
• Undo a COMMIT using any SQL statement.

You can:

• Roll back changes before issuing a COMMIT.
• Use SAVEPOINT and ROLLBACK TO SAVEPOINT to undo part of a transaction before committing.

Workaround: Flashback (If Enabled)

Oracle provides Flashback features (if properly configured) that can help in recovering from committed changes:

Examples:

• FLASHBACK TABLE to restore a table to a past state.
• Querying past data using AS OF TIMESTAMP.

🔸 These require:

• Flashback features to be enabled.
• Sufficient undo/retention time.
• Proper privileges.

Bottom Line:

Once you issue a COMMIT, there is no standard way to reverse or roll back that transaction. Be certain before committing.