INSERT INTO test.products
(ProductName, Price)
VALUES
("Product A","99,99"),
("Product B","49,95"),
("Product C","5,95");

INSERT INTO test.orders
(Customer)
VALUES
("Customer A"),
("Customer B"),
("Customer B");

INSERT INTO test.products_per_order
(Orders_idOrders, Products_idProducts, Price, Quantity)
VALUES
("1","1",(Select Price from test.products),"5"),
("1","2",(Select Price from test.products),"4"),
("2","1",(Select Price from test.products),"10"),
("3","2",(Select Price from test.products),"3"),
("3","3",(Select Price from test.products),"9");