CREATE TABLE table_name_51 (goal_difference VARCHAR, club VARCHAR, played VARCHAR)

what is the total number of goal different when the club is cf extremadura and the played is less than 38?
SELECT COUNT(goal_difference) FROM table_name_51 WHERE club = "cf extremadura" AND played < 38
SELECT COUNT("goal_difference") FROM "table_name_51" WHERE "cf extremadura" = "club" AND "played" < 38