SELECT count(*) ,  dept_code FROM professor WHERE prof_high_degree  =  'Ph.D.' GROUP BY dept_code
Find the number of professors with a Ph.D. degree in each department.
SELECT count ( * ) , dept_code FROM professor WHERE prof_high_degree = 'Ph.D . ' GROUP BY dept_code
select count ( * ) , dept_code from professor where prof_high_degree = value group by dept_code
Find the number of professors with a Ph.D. degree in each department .