การใช้หลาย CTE

-- Create a CTE named "orders" that handles the queries for the ecomm_orders table

WITH orders AS (
SELECT ___, items.___, items.___
FROM ecommerce.ecomm_orders, UNNEST(___) items 
WHERE items.price > ___
)

SELECT
	order_id,
	AVG(p.product_weight_g) as avg_weight
FROM orders o
JOIN ecommerce.ecomm_products p ON o.product_id = p.product_id
GROUP BY o.order_id;