CREATE TABLE tryout (enr INT, cName VARCHAR, pPos VARCHAR)
CREATE TABLE college (enr INT, cName VARCHAR, pPos VARCHAR)

What is the total number of enrollment of schools that do not have any goalie player?
SELECT SUM(enr) FROM college WHERE NOT cName IN (SELECT cName FROM tryout WHERE pPos = "goalie")
SELECT SUM("enr") FROM "college" WHERE NOT "cName" IN (SELECT "cName" FROM "tryout" WHERE "goalie" = "pPos")