CREATE TABLE plays_games (stuid NUMBER, gameid NUMBER, hours_played NUMBER)
CREATE TABLE sportsinfo (stuid NUMBER, sportname CLOB, hoursperweek NUMBER, gamesplayed NUMBER, onscholarship CLOB)
CREATE TABLE video_games (gameid NUMBER, gname CLOB, gtype CLOB)
CREATE TABLE student (stuid NUMBER, lname CLOB, fname CLOB, age NUMBER, sex CLOB, major NUMBER, advisor NUMBER, city_code CLOB)

Show all male student ids who don't play football.
SELECT stuid FROM student WHERE sex = 'M' EXCEPT SELECT stuid FROM sportsinfo WHERE sportname = "Football"
SELECT "stuid" FROM "student" WHERE "sex" = 'M' EXCEPT SELECT "stuid" FROM "sportsinfo" WHERE "Football" = "sportname"