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

What are the different allergy types?
SELECT DISTINCT allergytype FROM allergy_type
SELECT DISTINCT "allergytype" FROM "allergy_type"