CREATE TABLE Has_amenity (dormid NUMBER, amenid NUMBER)
CREATE TABLE Dorm_amenity (amenid NUMBER, amenity_name VARCHAR2)
CREATE TABLE Dorm (dormid NUMBER, dorm_name VARCHAR2, student_capacity NUMBER, gender VARCHAR2)
CREATE TABLE Student (StuID NUMBER, LName VARCHAR2, Fname VARCHAR2, Age NUMBER, Sex VARCHAR2, Major NUMBER, Advisor NUMBER, city_code VARCHAR2)
CREATE TABLE Lives_in (stuid NUMBER, dormid NUMBER, room_number NUMBER)

Bar graph to show maximal age from different sex, could you order by the Y in asc?
SELECT Sex, MAX(Age) FROM Student GROUP BY Sex ORDER BY MAX(Age)
SELECT "Sex", MAX("Age") FROM "Student" GROUP BY "Sex" ORDER BY MAX("Age")