CREATE TABLE schedule (film_id VARCHAR(255), show_times_per_day INTEGER); CREATE TABLE film (directed_by VARCHAR(255), film_id VARCHAR(255))
Show director with the largest number of show times in total.
    
SQL: SELECT T2.directed_by FROM schedule AS T1 JOIN film AS T2 ON T1.film_id = T2.film_id GROUP BY T2.directed_by ORDER BY SUM(T1.show_times_per_day) DESC LIMIT 1