1-- Rollback (cancellation)
2DELETE FROM employees WHERE employee_id = 123; -- Done in current session
3ROLLBACK; -- Cancelled in current session
4SELECT * FROM employees WHERE employee_id = 123; -- Found
5-- Commit (validation)
6DELETE FROM employees WHERE employee_id = 123; -- Done in current session
7COMMIT; -- Visible for ALL sessions
8SELECT * FROM employees WHERE employee_id = 123; -- Missing for ALL sessions