select concat ('{', '"id": ', f.film_id, ', ', '"title": ', '"', f.title, '"', ', ', '"category": ', '"', c.name, '"}') as film
from film f
join film_category fc on f.film_id = fc.film_id
join category c on fc.category_id = c.category_id
order by film->'$.id'
;
show status like 'Last_query_cost';