Here we are taking example to find out 3rd Heighest salary.
--**************************************
-- ************* 1st Query *************--**************************************
SELECT TOP 1 SALARY
FROM(
SELECT DISTINCT TOP 3 SALARY
FROM Employee
ORDER BY SALARY DESC
)a
Order by salary
--**************************************
-- ************* 2nd Query *************--**************************************
SELECT * FROM (
SELECT DENSE_RANK() OVER (ORDER BY SALARY DESC) AS rownumber,SalaryFROM Employee ) AS Maxs
WHERE rownumber = 3
--**************************************
-- ************* 3rd Query *************--**************************************
SELECT * FROM (
SELECTROW_NUMBER() OVER (ORDER BY SALARY DESC) AS rownumber,Salary
FROM Employee
) AS foo
WHERE rownumber = 3
--**************************************
-- ************* 4th Query *************--**************************************
Select *
From Employee E1Where 3 = (Select Count(Distinct(E2.Salary)) From Employee E2 Where E2.Salary >= E1.Salary)
--***********************************************************
-- ************* For Second Highest Salary Query *************--************************************************************
SELECT MAX(salary) AS SAL FROM EMPLOYEE WHERE salary<>(SELECT MAX(salary) FROM EMPLOYEE)
--***********************************************************
-- ************* For Understand Differnece between row_number(),rank() and dense_rank()function *************--************************************************************
SELECT salary
,row_number () OVER (ORDER BY salary DESC) as ROW_NUMBER,rank () OVER (ORDER BY salary DESC) as RANK
,dense_rank () OVER (ORDER BY salary DESC) as DENSE_RANK
FROM Employee
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