100分後、100時間後
SELECT current_date,current_timestamp,CURRENT_TIMESTAMP + INTERVAL '100 minutes';
SELECT current_date,current_timestamp,CURRENT_TIMESTAMP + INTERVAL '100 hours';
100日後
select current_date,current_timestamp,current_timestamp+ cast( '100 days' as INTERVAL );
100年後
SELECT CURRENT_TIMESTAMP + INTERVAL '100 years';