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 Products (product_name VARCHAR, product_id VARCHAR); CREATE TABLE Order_items (product_quantity INTEGER, product_id VARCHAR)
  ### Question:
  Show all product names and the total quantity ordered for each product name.
  ### Answer:
  SELECT T2.product_name, SUM(T1.product_quantity) FROM Order_items AS T1 JOIN Products AS T2 ON T1.product_id = T2.product_id GROUP BY T2.product_name