Find the names of all students who took some course and the course description?
SELECT T1.stu_fname ,  T1.stu_lname ,  T4.crs_description FROM student AS T1 JOIN enroll AS T2 ON T1.stu_num   =   T2.stu_num JOIN CLASS AS T3 ON T2.class_code   =   T3.class_code JOIN course AS T4 ON T3.crs_code   =   T4.crs_code
names of all students refers to stu_fname, stu_lname from student; took some course implies JOIN between student, enroll, class, and course tables; course description refers to crs_description from course;