select f.film_id, f.title
from film f left join film_category fc on f.film_id = fc.film_id
left join category c on fc.category_id = c.category_id
where c.category_id is null
select f.film_id, f.title
from film f left join film_category fc on f.film_id = fc.film_id
left join category c on fc.category_id = c.category_id
where c.category_id is null
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