Dynamic intersections between groups based on relation - sql

Question

I have 2 tables:
product_facet_values_facet_value
+-----------+--------------+
| productId | facetValueId |
+-----------+--------------+
| 6 | 1 |
| 6 | 34 |
| 7 | 39 |
| 8 | 34 |
| 8 | 1 |
| 8 | 11 |
| 9 | 1 |
| 9 | 39 |
+-----------+--------------+
facet_value
+--------------+---------+
| facetValueId | facetId |
+--------------+---------+
| 1 | 2 |
| 34 | 6 |
| 39 | 2 |
| 44 | 2 |
| 56 | 11 |
+--------------+---------+
I need to be able to get all productIds with those facetValueIds I ask for but with one extra step - I need an intersection between facetValueId groups based on same facetId.
For example I want to get all product ids with facetValueId 1, 34, 39 and result of this query should be same as I would get with the following query:
select "productId"
from "product_facet_values_facet_value"
where "facetValueId" in (1, 39)
INTERSECT
select "productId"
from "product_facet_values_facet_value"
where "facetValueId" in (34)
I wrote this query based on: facetValueIds 1 or 39 has same "facetId"=2, facetValueId 34 has "facetId"=6.
I need a query that would result in same result without having it to group it manually. If for example next time I ask for all products that have facetValueIds 1, 34, 39, 56 the result of such dynamic query should be same as if I would write 3 INTERSECTIONs between IN (1, 39) & IN(34) & IN(56) like:
select "productId"
from "product_facet_values_facet_value"
where "facetValueId" in (1, 39)
INTERSECT
select "productId"
from "product_facet_values_facet_value"
where "facetValueId" in (34)
INTERSECT
select "productId"
from "product_facet_values_facet_value"
where "facetValueId" in (56)

Answer 1

https://dbfiddle.uk/?rdbms=postgres_13&fiddle=d06344b4a68c7b97fc1fad46c7437894
This is the same method as #a_horse_with_no_name used, but generalised very slightly.
WITH
targets AS
(
SELECT * FROM facet_value WHERE facetId IN (2, 6)
)
SELECT
map.productId
FROM
product_facet_values_facet_value AS map
INNER JOIN
targets AS tgt
ON tgt.facetValueId = map.facetValueId
GROUP BY
map.productId
HAVING
COUNT(DISTINCT tgt.facetId) = (SELECT COUNT(DISTINCT facetId) FROM targets)