query: SELECT count(DISTINCT dept_name) ,  school_code FROM department GROUP BY school_code
question: How many department in each school?
query_toks: SELECT count ( DISTINCT dept_name ) , school_code FROM department GROUP BY school_code
query_toks_no_value: select count ( distinct dept_name ) , school_code from department group by school_code
question_toks: How many department in each school?