Query to get max salary of employee from each department code example

Example 1: how to get max salary in each department in sql

SELECT firstname, MAX(salary)
FROM department d LEFT OUTER JOIN employee e
ON (d.department_id = e.department_id)
GROUP BY department_id;

Example 2: get max salary from each department sql

--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);