how to find nth highest salary in postgresql code example

Example 1: nth highest salary

SELECT salary FROM Employee ORDER BY salary DESC LIMIT N-1, 1

Example 2: how to get nth number in sql

Here is the solution for nth highest
salary from employees table 

SELECT FIRST_NAME , SALARY FROM 
(SELECT FIRST_NAME, SALARY, DENSE_RANK() OVER
(ORDER BY SALARY DESC) AS SALARY_RANK
FROM EMPLOYEES)
WHERE SALARY_RANK = n;