CREATE TABLE game (stadium_id NUMBER, id NUMBER, season NUMBER, date CLOB, home_team CLOB, away_team CLOB, score CLOB, competition CLOB)
CREATE TABLE injury_accident (game_id NUMBER, id NUMBER, player CLOB, injury CLOB, number_of_matches CLOB, source CLOB)
CREATE TABLE stadium (id NUMBER, name CLOB, home_games NUMBER, average_attendance NUMBER, total_attendance NUMBER, capacity_percentage NUMBER)

How many games are free of injury accidents?
SELECT COUNT(*) FROM game WHERE NOT id IN (SELECT game_id FROM injury_accident)
SELECT COUNT(*) FROM "game" WHERE NOT "id" IN (SELECT "game_id" FROM "injury_accident")