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

How old is each student and how many students are each age?
SELECT age, COUNT(*) FROM student GROUP BY age
SELECT "age", COUNT(*) FROM "student" GROUP BY "age"