
/* Code Fragment 5.15 List all the salaries, past and present, of the employees who had been a hazardous waste specialist at some time. */

SELECT AMOUNT
FROM INCUMBENTS, POSITIONS, SAL_HISTORY
WHERE INCUMBENTS.SSN = SAL_HISTORY.SSN
AND INCUMBENTS.PCN = POSITIONS.PCN
AND JOB_TITLE_CODE1 = '20730'
