Question

I have two tables in my SQLLite database. I am trying to get back the drinks that can be made with the ingredients typed in.

I am trying to formulate this query to get what I want.

Table Drinks

Columns

drink_id | title | ingredients | directions | ingredientsNum

Sample row looks like

1 | Papa Smurf | 1 crushed blue popsicle, 8 oz Kool-Aid , 4 oz vodka | The directions | 3

Table Ingredients

Columns

drink_id | ingredient

Sample row looks like

1 | blue popsicle

My Query at the moment

This is my partial pseudocode at what I want to return (after I get this I’ll dynamically put in terms to query).

I want to return all drinks that have the amount of inputs to be equal to or more than the drinks ingredient number, and those inputted ingredients match all the ingredients needed in the drink.

SELECT drinks.title, drinks.ingredients, drinks.directions
FROM drinks, (SELECT count(ingredients._id) as ingredientNumber FROM ingredients
WHERE ingredients.ingredient LIKE '%rum%'
GROUP BY ingredients._id) as foundIngredients
WHERE drinks.ingredientsNum = foundIngredients.ingredientNumber;

Can anybody help me towards getting the best suited query or even giving me some hints on restructuring my database model? I just made this database from a long JSON file of 80k lines.

Answer 1

Query reflecting clarified question:

SELECT drinks.title, drinks.ingredients, drinks.directions
FROM drinks
WHERE drinks.ingredientsNum = (
    SELECT count(*)
    FROM ingredients
    WHERE (
        ingredients.ingredient LIKE '%rum%'
        OR ingredients.ingredient LIKE '%coke%'
        OR ingredients.ingredient LIKE '%vodka%'
        -- the same goes for each ingredient
    )
    AND ingredients.drink_id = drinks.drink_id
)

Similarly, if you allow a drink to have extra ingredients besides all specified:

SELECT drinks.title, drinks.ingredients, drinks.directions
FROM drinks
WHERE drinks.ingredientsNum >= [number of input ingredients]
AND [number of input ingredients] <= (
    SELECT count(*)
    FROM ingredients
    WHERE (
        ingredients.ingredient LIKE '%rum%'
        OR ingredients.ingredient LIKE '%coke%'
        OR ingredients.ingredient LIKE '%vodka%'
        -- the same goes for each ingredient
    )
    AND ingredients.drink_id = drinks.drink_id
)