--Find out the name of top earner in each departments
--Output has Name, Department name and max salary of the department
SELECT E.FIRST_NAME , D.DEPARTMENT_NAME, E.SALARY
FROM EMPLOYEES E
JOIN DEPARTMENTS D ON E.DEPARTMENT_ID = D.DEPARTMENT_ID
WHERE SALARY IN(SELECT MAX(E.SALARY)
FROM EMPLOYEES E
JOIN DEPARTMENTS D ON E.DEPARTMENT_ID = D.DEPARTMENT_ID
GROUP BY DEPARTMENT_NAME);