select
(to_number(to_char(sysdate, 'yyyy'))+5) benginyear ,
(to_number(to_char(sysdate, 'yyyy'))-5) endyear
from dual
select
(to_number(to_char(sysdate, 'yyyy'))+5) benginyear ,
(to_number(to_char(sysdate, 'yyyy'))-5) endyear
from dual