SELECT T1.student_id ,  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
What are the student ID and login name of the student who are enrolled in the most courses?
SELECT T1.student_id , 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
select t1 . student_id , 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 value
What are the student ID and login name of the student who are enrolled in the most courses ?