Reference Manual
CHAPTER 9. SQL Statements
To undo any changes made since the last COMMIT or ROLLBACK.
ROLLBACK [ WORK ]
Must be connected to the database.
Closes all cursors not opened WITH HOLD.
ROLLBACK TO SAVEPOINT statement
The ROLLBACK statement ends a logical unit of work (transaction) and undoes all changes made to the database during this transaction. A transaction is the database work done between COMMIT or ROLLBACK statements on one database connection.
SQL/92 Entry level feature.
Sybase Supported by Adaptive Server Enterprise.