SELECT head FROM department GROUP BY departmentID ORDER BY count(departmentID) LIMIT 1;
What is the employee id of the head whose department has the least number of employees?
SELECT head FROM department GROUP BY departmentID ORDER BY count ( departmentID ) LIMIT 1 ;
select head from department group by departmentid order by count ( departmentid ) limit value
What is the employee id of the head whose department has the least number of employees ?