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

What is the total enrollment number of all colleges?
SELECT SUM(enr) FROM college
SELECT SUM("enr") FROM "college"