text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE Order_items (product_id VARCHAR, order_id VARCHAR); CREATE TABLE Orders (order_id VARCHAR); CREATE TABLE Products (product_name VARCHAR, product_id VARCHAR)
  ### Question:
  Show all product names and the number of customers having an order on each product.
  ### Answer:
  SELECT T2.product_name, COUNT(*) FROM Order_items AS T1 JOIN Products AS T2 ON T1.product_id = T2.product_id JOIN Orders AS T3 ON T3.order_id = T1.order_id GROUP BY T2.product_name