CREATE TABLE CLASS (crs_code VARCHAR(255), prof_num VARCHAR(255)); CREATE TABLE employee (emp_fname VARCHAR(255), emp_num VARCHAR(255))
Find the first names of all instructors who have taught some course and the course code.
    
SQL: SELECT T2.emp_fname, T1.crs_code FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num = T2.emp_num