SELECT salary FROM employees
  VERSIONS BETWEEN TIMESTAMP
    SYSTIMESTAMP - INTERVAL '10' MINUTE AND
    SYSTIMESTAMP - INTERVAL '1' MINUTE
  WHERE last_name = 'Chung';
---------------------------
SELECT salary
FROM employees
VERSIONS BETWEEN TIMESTAMP (SYSTIMESTAMP - INTERVAL '10' MINUTE) AND SYSTIMESTAMP - INTERVAL '1' MINUTE
WHERE last_name = 'Chung';