# Find ingredients included in recipe
SELECT ingredient.designation AS Ingredient FROM RecipeContainsIngredients WHERE recipe.name = 'Tomato Basil Salad';

# get Ingredients where carbohydrates are lower than 40
SELECT designation FROM Ingredient WHERE carbohydrates <= 40;

# find user that ingredients
SELECT order.customer.first_name AS Name FROM OrderContainsIngredients WHERE ingredient.designation = 'Schalotte';

# Get total amount spend by each customer
SELECT string::concat(customer.first_name, ' ',  customer.last_name) as customer, math::sum(invoice_amount) AS total_spent
FROM Order
GROUP BY customer;

# Total number of deliver cost per supplyer
SELECT supplier.name AS supplier, math::sum(delivery_cost) AS total_delivery_cost
FROM SupplierContainsIngredients
GROUP BY supplier;

# Get cheapest delivery price
SELECT ingredient.designation AS ingredient , math::min(delivery_cost) AS min_delivery_price
FROM SupplierContainsIngredients
GROUP BY ingredient;

# Amount of Customers per city
SELECT address.city AS city, COUNT() AS customer_count
FROM Customer
GROUP BY city;

# Stock low warning
DEFINE EVENT ingredient_stock_low ON TABLE Ingredient
WHEN $after.stock < 10 THEN (
    CREATE alert SET message = "Stock for ingredient " || $after.designation || " is low.",
        ingredient_id = $value.id,
        created_at = time::now()
);

# User Data Exporting
LET $customer = 'd.foede@web.de';
SELECT *, address.*, (SELECT * FROM Order WHERE customer.email = $customer) AS orders FROM Customer WHERE email = $customer;

# Delete User Data
LET $customer = SELECT id FROM Customer WHERE email = 'd.foede@web.de';
DELETE $customer.address;
DELETE OrderContainsIngredients WHERE order.customer = $customer;
DELETE Order WHERE customer = $customer;
DELETE $customer;