What is the name of department where has the largest number of professors with a Ph.D. degree?
create table professor (dept_code varchar, prof_high_degree varchar, PRIMARY KEY (dept_code)); create table department (dept_name varchar, dept_code varchar, PRIMARY KEY (dept_name))
select t2.dept_name, t1.dept_code from professor as t1 join department as t2 on t1.dept_code = t2.dept_code where t1.prof_high_degree = 'ph.d.' group by t1.dept_code order by count(*) desc limit 1