How can I select the record with the 2nd highest salary in database Oracle?

Question

Suppose I have a table employee with id, user_name, salary. How can I select the record with the 2nd highest salary in Oracle?

I googled it, find this solution, is t

Answer 1

select * from emp where sal = (
select sal from
     (select rownum n,a.sal from
    ( select distinct sal from emp order by sal desc) a)
where n = 2);

This is more optimum, it suits all scenarios...