CREATE TABLE Student_Course_Enrolment (course_id VARCHAR2)
CREATE TABLE Courses (course_name VARCHAR2, course_id VARCHAR2)

What is the name of each course and the corresponding number of student enrollment?
SELECT T1.course_name, COUNT(*) FROM Courses AS T1 JOIN Student_Course_Enrolment AS T2 ON T1.course_id = T2.course_id GROUP BY T1.course_name
SELECT "T1"."course_name", COUNT(*) FROM "Courses" "T1" JOIN "Student_Course_Enrolment" "T2" ON "T1"."course_id" = "T2"."course_id" GROUP BY "T1"."course_name"