SELECT DISTINCT T1.course_name FROM Courses AS T1 JOIN Student_Enrolment_Courses AS T2 ON T1.course_id = T2.course_id
Apa saja semua nama kursus kursus yang pernah dimiliki siswa?
CREATE TABLE Courses (course_name VARCHAR, course_id VARCHAR); CREATE TABLE Student_Enrolment_Courses (course_id VARCHAR)