oracle rollback
-- Rollback (cancellation)
DELETE FROM employees WHERE employee_id = 123; -- Done in current session
ROLLBACK; -- Cancelled in current session
SELECT * FROM employees WHERE employee_id = 123; -- Found
-- Commit (validation)
DELETE FROM employees WHERE employee_id = 123; -- Done in current session
COMMIT; -- Visible for ALL sessions
SELECT * FROM employees WHERE employee_id = 123; -- Missing for ALL sessions