yes
select count ( * ) from student_course_enrolment as t1 join students as t2 on t1.student_id = t2.student_id group by t1.student_id order by count ( * ) desc limit 1
What is the student ID with the most course enrollments
select t1.student_id from student_course_enrolment as t1 join students as t2 on t1.student_id = t2.student_id group by t1.student_id order by count ( * ) desc limit 1
what is the login name of the student with the most course enrollments?
select t2.login_name from student_course_enrolment as t1 join students as t2 on t1.student_id = t2.student_id group by t1.student_id order by count ( * ) desc limit 1