Pozyskiwanie produktów o pożądanych atrybutach

Te dwa filtry należy obsługiwać osobno, ponieważ każdy filtr musi patrzeć na zupełnie inne rekordy w products_attributes_values tabeli.

SELECT * FROM products
WHERE category_id IN ('6', '7', '29', '8', '9', '36')
    AND id IN (
        SELECT product_id
        FROM products_attributes_values
        WHERE attribute_id = 2
            AND value_id = '4')
    AND id IN (
        SELECT product_id
        FROM products_attributes_values
        WHERE attribute_id = 3
            AND value_id = '11')

Z UAMoto:

Działa, ale trochę wolno, więc użyłem aliasów sprzężenia, jak powiedziała mi jedna osoba:

"SELECT * FROM `products`
JOIN `products_attributes_values` AS pav1
ON (`pav1`.`product_id` = `products`.`id`)
JOIN `products_attributes_values` AS pav2
ON (`pav2`.`product_id` = `products`.`id`)
WHERE `category_id` IN ('6', '7', '29', '8', '9', '36')
AND (`pav1`.`attribute_id` = '2' AND `pav1`.`value_id` = '4')
AND (`pav2`.`attribute_id` = '3' AND `pav2`.`value_id` = '11')"

Zaktualizowane zapytania o kombinacje atrybutów:

SELECT * FROM products
WHERE category_id IN ('6', '7', '29', '8', '9', '36')
    AND id IN (
        SELECT product_id
        FROM products_attributes_values
        WHERE attribute_id = 2
            AND value_id IN ('4', '5'))
    AND id IN (
        SELECT product_id
        FROM products_attributes_values
        WHERE attribute_id = 3
            AND value_id IN ('11', '62'))

lub

SELECT *
FROM `products`
    JOIN `products_attributes_values` AS pav1 ON (`pav1`.`product_id` = `products`.`id`)
    JOIN `products_attributes_values` AS pav2 ON (`pav2`.`product_id` = `products`.`id`)
WHERE `category_id` IN ('6', '7', '29', '8', '9', '36')
AND (`pav1`.`attribute_id` = '2' AND `pav1`.`value_id` IN ('4', '5'))
AND (`pav2`.`attribute_id` = '3' AND `pav2`.`value_id` IN ('11', '62'))