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

What are the ids of all students who played video games and sports?
SELECT stuid FROM sportsinfo INTERSECT SELECT stuid FROM plays_games
SELECT "stuid" FROM "sportsinfo" INTERSECT SELECT "stuid" FROM "plays_games"