8.1 加减日月年

Posted 2020-09-16

select hiredate - interval 5 day as   hd_minus_5D,
             hiredate + interval 5 day as   hd_plus_5D,
             hiredate - interval 5 month as hd_minus_5M,
             hiredate + interval 5 month as hd_plus_5M,
             hiredate - interval 5 year as  hd_minus_5Y,
             hiredate + interval 5 year as  hd_plus_5Y
from emp
where deptno=10;