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

Show all allergy types and the number of allergies in each type Plot them as bar chart, show by the x-axis in desc.
SELECT AllergyType, COUNT(*) FROM Allergy_Type GROUP BY AllergyType ORDER BY AllergyType DESC
SELECT "AllergyType", COUNT(*) FROM "Allergy_Type" GROUP BY "AllergyType" ORDER BY "AllergyType" DESC