In how many ways can you calculate the employee having maximum salary?

757    Asked by JohnSimpson in SQL Server , Asked on Jan 27, 2020
Answered by Dhananjay Singh

Below are few methods by which maximum salary can be calculated:

Way 1: get the max in the inner query and do a inner join

select EMPLOYID,EMPLOYNAME,EMPLOYSALARY from

( select MAX(EMPLOYSALARY) MAX_EMPLOYSALARY

from EMPLOY ) a inner join EMPLOY on MAX_EMPLOYSALARY=EMPLOYSALARY

Way 2: apply rank and get the rank=1

select EMPLOYID,EMPLOYNAME,EMPLOYSALARY from

( select EMPLOYID,EMPLOYNAME,EMPLOYSALARY,RANK() OVER(ORDER BY EMPLOYSALARY DESC)r

 from EMPLOY )a where r=1

Way 3: get the top 1 and order by EMPLOYSALARY

select top 1 EMPLOYID,EMPLOYNAME,EMPLOYSALARY

 from EMPLOY

 order by EMPLOYSALARY desc

Way 4: use in where condition

select EMPLOYID,EMPLOYNAME,EMPLOYSALARY from EMPLOY where EMPLOYSALARY = ( select max(EMPLOYSALARY) from EMPLOY )

Way 5: using a CTE(common table expression)

with cte as

( select EMPLOYEE,EMPLOYNAME,EMPLOYEE SALARY,RANK() OVER(ORDER BY EMPLOYSALARY DESC)r

 from EMPLOY )

select EMPLOYEE,EMPLOYNAME,EMPLOYEE SALARY from cte where r=1

We can use this to find any Nth level of rank as well e.g. fo 8th rank:

with cte as

( select EMPLOYEE,EMPLOYNAME,EMPLOYEE SALARY,RANK() OVER(ORDER BY EMPLOYSALARY DESC)r

 from EMPLOY )

select EMPLOYEEID,EMPLOYEENAME,EMPLOYEE SALARY from cte where r=8



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