如何搜索表中是否存在多个值并且在另一列中都具有相同的值？

Question

I'm looking to do something that is probably very simple to do but I can't formulate it and I don't really get help from Google. I basically have 3 tables in my db, one is cocktails (with id and value), one is ingredients (with id and value too) and one is correspondences (with id, cocktail ids and ingredient ids). This table basically reports what ingredient all cocktails have.

Through a form I'm given an array of ingredient ids in a $_GET['ingredients'] variable.

I want to make a query in which I search for cocktails that I have enough ingredients to make.

I'm very sorry this is not very clear but I can't find any simpler way to describe my issue. Can any of you help me?

Answer 1

I want to make a query in which I search for cocktails that I have enough ingredients to make.

We can phrase the logic with not exists : we want all cocktails that have no ingredients that do not belong to our list.

In SQL:

select *
from cocktails c
where not exists (
    select 1
    from correspondences r
    where 
        r.id_cocktail = c.id
        and r.id_ingredient not in (?, ?, ?)
)

This assumes that a cocktail always has at least one dependent row in correspondences .

The question marks represent the input list of ingredients, that you need to pass from your application.