Database: cre_Students_Information_Systems
Question: How many students have joined in the most common type of event? List the number, the event type and description.
SQL:
SELECT count(*) ,  T2.event_type_code ,  T3.event_type_description FROM Students AS T1 JOIN Student_Events AS T2 ON T1.student_id  =  T2.student_id JOIN Ref_Event_Types AS T3 ON T2.event_type_code  =  T3.event_type_code GROUP BY T2.event_type_code ORDER BY count(*) DESC LIMIT 1