Return the descriptions and names of the courses that have more than two students enrolled in.
SELECT T1.course_description ,  T1.course_name FROM Courses AS T1 JOIN Student_Course_Enrolment AS T2 ON T1.course_id  =  T2.course_id GROUP BY T1.course_name HAVING COUNT(*)  >  2
courses that have more than two students enrolled in refers to HAVING COUNT(*) > 2; descriptions and names of the courses refers to course_description and course_name;