SELECT T2.emp_fname ,  T1.crs_code FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num  =  T2.emp_num
Find the first names of all instructors who have taught some course and the course code.
SELECT T2.emp_fname , T1.crs_code FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num = T2.emp_num
select t2 . emp_fname , t1 . crs_code from class as t1 join employee as t2 on t1 . prof_num = t2 . emp_num
Find the first names of all instructors who have taught some course and the course code .