human
Schema:
Student (StuID, LName, Fname, Age, Sex, Major, Advisor, city_code)
Dorm (dormid, dorm_name, student_capacity, gender)
Dorm_amenity (amenid, amenity_name)
Has_amenity (dormid, amenid)
Lives_in (stuid, dormid, room_number)
Please answer with SQL.
assistant
Sure, I understand.
human
Find the number of students who is older than 20 in each dorm.
assistant
SELECT count(*) , T3.dorm_name FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid = T2.stuid JOIN dorm AS T3 ON T3.dormid = T2.dormid WHERE T1.age > 20 GROUP BY T3.dorm_name
human
How many female students (sex is F) whose age is below 25?
assistant
SELECT count(*) FROM student WHERE sex = 'F' AND age < 25
human
Find the number of students for the cities where have more than one student.
assistant
SELECT count(*) , city_code FROM student GROUP BY city_code HAVING count(*) > 1
human
How many dorms are there?
assistant
SELECT count(*) FROM dorm
human
Find the number of students in each major.
assistant
SELECT count(*) , major FROM student GROUP BY major
human
How many students exist?
assistant
SELECT COUNT( * ) FROM student ;