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)

How many distinct allergies are there?
SELECT COUNT(DISTINCT allergytype) FROM allergy_type
SELECT COUNT(DISTINCT "allergytype") FROM "allergy_type"