Selecting against subsets of a list in MySQL

Question

I\'m quite a begginer and I have two tables: \"product\" and \"product attributes\".

Here\'s some imaginary data (the actual stuff involves more tables )

Pr

Answer 1

This should return only those id's where all attributes for each id are completely contained within the list:

select attribute_match.id_product from
 (select id_product, count(*) c from attributes
  where id_attribute in (21, 10, 25)
  group by id_product) attribute_match,
 (select id_product, count(*) c_count from attributes
  group by id_product) attribute_total
where attribute_match.id_product = attribute_total.id_product
      and attribute_match.c = attribute_total.c