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CREATE TABLE products (`id` int, `name` varchar(9)) ; INSERT INTO products (`id`, `name`) VALUES (1, 'asd wef'), (2, 'gggg2222'), (3, 'pppga 99'), (4, 'lalala 55') ; CREATE TABLE categories (`id` int, `level` int, `parent_id` int, `name` varchar(7)) ; INSERT INTO categories (`id`, `level`, `parent_id`, `name`) VALUES (20, 1, NULL, 'Fashion'), (22, 2, 20, 'Top'), (23, 3, 22, 'T-Shirt'), (24, 3, 22, 'Jacket') ; CREATE TABLE product_categories (`product_id` int, `category_id` int) ; INSERT INTO product_categories (`product_id`, `category_id`) VALUES (1, 20), (1, 22), (1, 23), (2, 22), (2, 20), (3, 20), (4, 20) ;
WITH prods AS ( SELECT product_id, MAX(category_id) AS stop_cat FROM product_categories GROUP BY product_id ) SELECT c.id AS category_id, COUNT(DISTINCT pc.product_id) AS total_product, SUM(c.id = p.stop_cat) AS stopped_product FROM categories c JOIN product_categories pc ON pc.category_id = c.id JOIN prods p ON p.product_id = pc.product_id GROUP BY c.id
category_id
total_product
stopped_product
20
4
2
22
2
1
23
1
1