ROLLBACK [ WORK | TRANSACTION ]
Message returned if successful.
If there is not any transaction currently in progress.
ROLLBACK rolls back the current transaction and causes
all the updates made by the transaction to be discarded.
to successfully terminate a transaction.
ABORT is a
synonym for ROLLBACK.
To abort all changes:
SQL92 only specifies the two forms ROLLBACK
and ROLLBACK WORK. Otherwise full compatibility.