CREATE TABLE tryout (pid DECIMAL, cname TEXT, ppos TEXT, decision TEXT)
CREATE TABLE player (pid DECIMAL, pname TEXT, ycard TEXT, hs DECIMAL)
CREATE TABLE college (cname TEXT, state TEXT, enr DECIMAL)

What are the unique types of player positions in the tryout?
SELECT COUNT(DISTINCT ppos) FROM tryout
SELECT COUNT(DISTINCT "ppos") FROM "tryout"