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

Show student ids who are female and play football.
SELECT stuid FROM student WHERE sex = 'F' INTERSECT SELECT stuid FROM sportsinfo WHERE sportname = "Football"
SELECT "stuid" FROM "student" WHERE "sex" = 'F' INTERSECT SELECT "stuid" FROM "sportsinfo" WHERE "Football" = "sportname"