CREATE TABLE allergy_type (allergy TEXT, allergytype TEXT)
CREATE TABLE student (stuid DECIMAL, lname TEXT, fname TEXT, age DECIMAL, sex TEXT, major DECIMAL, advisor DECIMAL, city_code TEXT)
CREATE TABLE has_allergy (stuid DECIMAL, allergy TEXT)

Show all majors and corresponding number of students.
SELECT major, COUNT(*) FROM student GROUP BY major
SELECT "major", COUNT(*) FROM "student" GROUP BY "major"