CREATE TABLE races (driverId VARCHAR(255), raceId VARCHAR(255), YEAR VARCHAR(255)); CREATE TABLE results (driverId VARCHAR(255), raceId VARCHAR(255), YEAR VARCHAR(255))
How many drivers did not participate in the races held in 2009?
    
SQL: SELECT COUNT(DISTINCT driverId) FROM results WHERE NOT raceId IN (SELECT raceId FROM races WHERE YEAR <> 2009)