Find the number of amenities for each of the dorms that can accommodate more than 100 students.
CREATE TABLE dorm (dormid VARCHAR, student_capacity INTEGER); CREATE TABLE has_amenity (dormid VARCHAR)
[SQL] SELECT COUNT(*), T1.dormid FROM dorm AS T1 JOIN has_amenity AS T2 ON T1.dormid = T2.dormid WHERE T1.student_capacity > 100 GROUP BY T1.dormid [/SQL]