Database: e_learning
Question: Find the subject ID, name of subject and the corresponding number of courses for each subject, and sort by the course count in ascending order.
SQL: select t1.subject_id ,  t2.subject_name ,  count(*) from courses as t1 join subjects as t2 on t1.subject_id  =  t2.subject_id group by t1.subject_id order by count(*) asc