Find the number of different departments in each school whose number of different departments is less than 5.
SELECT count(DISTINCT dept_name) ,  school_code FROM department GROUP BY school_code HAVING count(DISTINCT dept_name)  <  5
SELECT count(DISTINCT dept_name) ,  school_code FROM department GROUP BY school_code HAVING count(DISTINCT dept_name)  <  5
[{'count(DISTINCT dept_name)': 4, 'SCHOOL_CODE': 'BUS'}]