In my application, I have 3 tables:
- recipes
-id -name -description
- ingredients
-id -name
- recipes_ingredients
-recipes_id -ingredients_id
I need to find all those recipes that contain a list of ingredients_id and that I have in my food storage and containing NO OTHERS ids outside the list I provided (so not in my food storage).
Example: i provide oil (id=111) bread=(id=222) result recipes:
- OK oil+bread
- OK bread
- OK oil
- NO oil+ salt
- NO bread + oil + salt
this query IT DOESN’T WORKS because it gives me back the recipes that have exclusively and exactly the ingredients provided:
SELECT ri.recipes_id FROM recipes_ingredients ri WHERE ri.ingredients_id IN (111,222) GROUP BY ri.recipes_id HAVING COUNT(*) = 2;
I also tried to change HAVING COUNT in
HAVING COUNT(*) <= length_of_list_I_provided
but he gives me back all the recipes that, yes, have even only a part of the ingredients supplied but also the ingredients that I have not provided it in the list.
Do you have any ideas?
thanks and regards
UPDATE:
as they suggested to me, I show you an example of tables:
Recipes table:
ID | NAME |
---|---|
1 | Recipe 1 |
2 | Recipe 2 |
3 | Recipe 3 |
4 | Recipe 4 |
5 | Recipe 5 |
6 | Recipe 6 |
Ingredients table:
ID | NAME |
---|---|
111 | Oil |
222 | Bread |
333 | Salt |
444 | Pepper |
Recipes_Ingredients table:
RECIPES_ID | INGREDIENTS_ID |
---|---|
1 | 111 |
1 | 222 |
2 | 222 |
3 | 222 |
3 | 333 |
4 | 111 |
4 | 222 |
4 | 333 |
5 | 333 |
5 | 444 |
6 | 111 |
In the query I give it my ingredients
IN(111,222)
It must return:
RECIPE_ID |
---|
1 |
2 |
6 |
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Answer
So maybe you can use this query
SELECT ri.recipes_id FROM recipes_ingredients ri GROUP BY ri.recipes_id HAVING COUNT(CASE WHEN ri.ingredients_id NOT IN (111,222) THEN 1 ELSE NULL END) =0;