Rolls back the current transaction and backs out all updates in the transaction.
ROLLBACK backs out of all changes that a transaction makes to a database if the transaction fails to be executed due to a fault.
If a ROLLBACK statement is executed out of a transaction, no error occurs, but a warning information is displayed.
ROLLBACK [ WORK | TRANSACTION ];
WORK | TRANSACTION
Optional keyword that more clearly illustrates the syntax.
-- Start a transaction: START TRANSACTION; -- Back out all changes: ROLLBACK;