CREATE TABLE has_allergy (stuid DECIMAL, allergy TEXT)
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)

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