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 orders (order_id VARCHAR); CREATE TABLE order_items (order_id VARCHAR)
  ### Question:
  What is the id of the order which has the most items?
  ### Answer:
  SELECT T1.order_id FROM orders AS T1 JOIN order_items AS T2 ON T1.order_id = T2.order_id GROUP BY T1.order_id ORDER BY COUNT(*) DESC LIMIT 1