You can get the 3rd maximum salary as :
SELECT MIN(Emp_Salary) FROM Salary WHERE Emp_Salary IN(SELECT TOP 3 Emp_Salary FROM Salary ORDER BY Emp_Salary DESC)
You can get the 3rd maximum salary as :
SELECT MIN(Emp_Salary) FROM Salary WHERE Emp_Salary IN(SELECT TOP 3 Emp_Salary FROM Salary ORDER BY Emp_Salary DESC)