CREATE TABLE Student (StuID NUMBER, LName VARCHAR2, Fname VARCHAR2, Age NUMBER, Sex VARCHAR2, Major NUMBER, Advisor NUMBER, city_code VARCHAR2)
CREATE TABLE Allergy_Type (Allergy VARCHAR2, AllergyType VARCHAR2)
CREATE TABLE Has_Allergy (StuID NUMBER, Allergy VARCHAR2)

Show the average age for male and female students with a bar chart, and could you list bar from high to low order?
SELECT Sex, AVG(Age) FROM Student GROUP BY Sex ORDER BY Sex DESC
SELECT "Sex", AVG("Age") FROM "Student" GROUP BY "Sex" ORDER BY "Sex" DESC