select top 3 rd or nth highest salary from emp table using sql query without using top keyword

Query 1->>  Using   DENSE_RANK()     *******************************************

SELECT Salary,username

FROM

(

SELECT Salary,username,DENSE_RANK() OVER(ORDER BY Salary DESC) Rno from Emp

) tbl

WHERE Rno=nth

Query 2->>  Using   ROW_NUMBER()     *******************************************

SELECT Salary,username

FROM

(

SELECT Salary,username,ROW_NUMBER() OVER(ORDER BY Salary DESC) Rno from Emp

) tbl

WHERE Rno=nth

Query 3->>  Using  top keyword     *******************************************

SELECT TOP 1 salary

FROM (

      SELECT DISTINCT TOP 3 salary

      FROM Emp

      ORDER BY salary DESC

      ) a

ORDER BY salary

Query 3->>  Using  Sub Query   *******************************************

SELECT *

FROM Emp Emp1

WHERE (3-1) = (

SELECT COUNT(DISTINCT(Emp2.Salary))

FROM Emp Emp2

WHERE Emp2.Salary > Emp1.Salary)