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

How many students, on average, does each college have enrolled?
SELECT AVG(enr) FROM college
SELECT AVG("enr") FROM "college"