List the film with the highest budget in each genre.
highest budget refers to max(budget); each genre refers to genre_name; film also means movie; list the film refers to title of movie
SELECT T3.genre_name, MAX(T1.budget) FROM movie AS T1 INNER JOIN movie_genres AS T2 ON T1.movie_id = T2.movie_id INNER JOIN genre AS T3 ON T2.genre_id = T3.genre_id GROUP BY T3.genre_name