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

Give me a pie to show the average of age from different sex.
SELECT Sex, AVG(Age) FROM Student GROUP BY Sex
SELECT "Sex", AVG("Age") FROM "Student" GROUP BY "Sex"