कोशिश करें:
SELECT Product.title, User.username, Order.id
FROM Order
INNER join Product ON Order.ProductID = Product.ID
INNER JOIN user ON Product.UserID = User.ID
कोशिश करें:
SELECT Product.title, User.username, Order.id
FROM Order
INNER join Product ON Order.ProductID = Product.ID
INNER JOIN user ON Product.UserID = User.ID