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You’re an analyst for an e-commerce store. You’re trying to identify the top selling products in 
Q4 2017 by region. You have 2 tables that you can query.

Table: all_products
Column Name	    Data Type	Description
product_id	    integer	    id of the product
product_name	string	    name of the product
sku	            integer	    universal stockkeeping unit number
distributor_id	integer	    unique id for distributor

Table: orders
Column Name	    Data Type	Description
date	        string	    format is "YYYY-MM-DD"
user_id	        integer	    user id of purchaser
order_id	    integer	    unique order number
product_id	    integer	    id of product
no_units	    integer	    number of units sold in the order
price	        integer	    price per item
shipping_id	    integer	    id of shipping information
region	        string	    region of shipping id

Write a SQL query to find the top 5 selling products by region. 
Include both the distributor id as well as the name of the product in your results.
"""


