Mysql intersect results

Question

I\'m trying to do something like the PHP array_intersect. I have the following table

CREATE TABLE `recipes_ingredients_items` (
  `id` INTEGER(11) D         


        

Answer 1

Normally you would do an intersection of the itemid‍s of each id:

(SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 71)
INTERSECT
(SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 2)
INTERSECT
(SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 22)

This will only select those itemid‍s where there is an id for all three id‍s.

But since MySQL does not support INTERSECT, you need to use inner joins:

SELECT DISTINCT itemid FROM recipes_ingredients_items
INNER JOIN (SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 71) a USING (itemid)
INNER JOIN (SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 2) b USING (itemid)
INNER JOIN (SELECT DISTINCT itemid FROM recipes_ingredients_items WHERE id = 22) c USING (itemid)

Answer 2

Try this:

SELECT item_id
FROM recipes_ingredients_items
WHERE id IN (71, 2, 22)
GROUP BY item_id
HAVING COUNT(*) = 3