SELECT NVL(ADD_MONTHS(END_DATE,1)SYSDATE) FROM programs;
SELECT TO_DATE(NVL(SYSDATE-END_DATE,SYSDATE)) FROM programs;
SELECT NVL(MONTHS_BETWEEN(start_date,end_date),‘Ongoing’) FROM programs;
SELECT NVL(TO_CHAR(MONTHS_BETWEEN(start-date,end_date)),‘Ongoing’) FROM programs;