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with a as(select film.title,film_category.category_id ,count(rental_id) c from film_category join film on film_category.film_id = film.film_id join inventory on film.film_id = inventory.film_id join rental on inventory.inventory_id = rental.inventory_id where year(rental_date) = '2005' group by film_category.film_id,film_category.category_id), b as (select * ,row_number() over (partition by category_id order by c desc) as a1 from a) select name as category,GROUP_CONCAT(title order by title) from b join category on b.category_id = category.category_id group by category,a1

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