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

Plot the total number by grouped by city code as a bar graph, and could you list in ascending by the y axis?
SELECT city_code, COUNT(*) FROM Student GROUP BY city_code ORDER BY COUNT(*)
SELECT "city_code", COUNT(*) FROM "Student" GROUP BY "city_code" ORDER BY COUNT(*) NULLS FIRST