SELECT count(*) ,  T1.school_code FROM department AS T1 JOIN professor AS T2 ON T1.dept_code  =  T2.dept_code GROUP BY T1.school_code
What is the number of professors for different school?
SELECT count ( * ) , T1.school_code FROM department AS T1 JOIN professor AS T2 ON T1.dept_code = T2.dept_code GROUP BY T1.school_code
select count ( * ) , t1 . school_code from department as t1 join professor as t2 on t1 . dept_code = t2 . dept_code group by t1 . school_code
What is the number of professors for different school ?