Chinastark/bird_dataset huggingface dataset:
Column: line_id
Name: line id
Data format: integer 
Description: the unique identifier of the order line
Column: order_id
Name: order id 
Data format: integer
Description: the id of the order
Maps to cust_order(order_id)
Column: price
Data format: real
Description: the price of the order
Value description: commonsense evidence:
Even though the customer ordered the book with the same book id, the price could be different. The price of the order may be influenced by the shipping method, seasonal discount, and the number of books the customer ordered.