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

Find the players whose names contain letter 'a'.
SELECT DISTINCT pname FROM player WHERE pname LIKE '%a%'
SELECT DISTINCT "pname" FROM "player" WHERE "pname" LIKE '%a%'