query: SELECT count(DISTINCT dept_address) ,  school_code FROM department GROUP BY school_code
question: How many different location it is  that each school having?
query_toks: SELECT count ( DISTINCT dept_address ) , school_code FROM department GROUP BY school_code
query_toks_no_value: select count ( distinct dept_address ) , school_code from department group by school_code
question_toks: How many different location it is that each school having?