Find the ids of the employees who does not work in those departments where some employees works whose manager id within the range 100 and 200.
SELECT * FROM employees WHERE department_id NOT IN (SELECT department_id FROM departments WHERE manager_id BETWEEN 100 AND 200)
employees not working in departments = NOT IN(SELECT department_id...); departments where some employees work whose manager id within the range 100 and 200 refers to WHERE manager_id BETWEEN 100 AND 200;