How to also list duplicates values within IN?

Question

I have a query where the elements I want to show come from a big list of elements where you can have the same element several times and I need to show all the elements from that list, even those elements that are repeated.

Table is called features and its fields are id , name , type .

In this example the list of elements is (1, 15, 15, 15, 23, 46) where 15 is repeated three times.

My initial query (it does not work):

SELECT f.* FROM features f WHERE f.id IN (1, 15, 15, 15, 23, 46)

When I run the query it only shows me elements 1,15,23, 46 and I'd love to see a query listing you all those 6 elements. Is that possible? How?

EDIT: This data (features) is used to create cards for a deck of cards. The cards are chosen by the user and they can choose the same card several times.

Answer 1

The list must be a rowset in FROM, not a list in WHERE:

SELECT f.* 
FROM features f 
JOIN (SELECT 1 AS id UNION ALL
      SELECT 15 UNION ALL
      SELECT 15 UNION ALL
      SELECT 15 UNION ALL
      SELECT 23 UNION ALL
      SELECT 46) criteria USING (id)