SELECT json_agg(json_build_object(
'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 f.film_id;
;
show status like 'Last_query_cost';