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

Find the last name and age of the student who has allergy to both milk and cat Show a bar chart, and sort total number from high to low order.
SELECT LName, Age FROM Student WHERE StuID IN (SELECT StuID FROM Has_Allergy WHERE Allergy = "Milk" INTERSECT SELECT StuID FROM Has_Allergy WHERE Allergy = "Cat") ORDER BY Age DESC
SELECT "LName", "Age" FROM "Student" WHERE "StuID" IN (SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Milk" INTERSECT SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Cat") ORDER BY "Age" DESC