Question

Let’s say I have a table making a junction between two tables… like this:

id_product | id_category
-----------------
11 | 22
11 | 33
12 | 22
12 | 33

I want to get id_products (distinct) according to a list of searched categories IDs.

If I use the IN() clause, the list of id_categories uses a logical OR.

How can I make a SELECT query to have logical ANDs for the list of id_categ submitted??

Example: I want all the id_products belonging to category 22 AND 33 (and possibly 5+ more Categ. IDs)

I found this answer:
Using MySQL IN clause as all inclusive (AND instead of OR)
…but the query is mixing more than 1 table… I only want a query on a single table, the junction one.

Answer 1

reading your link, I think it would be something like

select id_product 
from yourTable
where id_category in (--your List goes Here)
group by id_product 
having count(distinct id_category) = NumberOfElementsOfYourList

you should use = if only wants to get that id_category, but no others id_category.
If not, use >=