Using multiple CTEs
Using multiple CTEs can greatly improve the performance and legibility of code. In this example, you will split a query into two CTEs to make it easier to read and more performant.
Bu egzersiz
Introduction to BigQuery
kursunun bir parçasıdırUygulamalı interaktif egzersiz
Bu örnek kodu tamamlayarak bu egzersizi bitirin.
-- 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;