SELECT  T1.customer_name ,  T1.customer_phone FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id  =  T2.customer_id JOIN order_items AS T3 ON T3.order_id  =  T2.order_id GROUP BY T1.customer_id ORDER BY sum(T3.order_quantity) DESC LIMIT 1
What are the name and phone of the customer with the most ordered product quantity?
SELECT T1.customer_name , T1.customer_phone FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id JOIN order_items AS T3 ON T3.order_id = T2.order_id GROUP BY T1.customer_id ORDER BY sum ( T3.order_quantity ) DESC LIMIT 1
select t1 . customer_name , t1 . customer_phone from customers as t1 join customer_orders as t2 on t1 . customer_id = t2 . customer_id join order_items as t3 on t3 . order_id = t2 . order_id group by t1 . customer_id order by sum ( t3 . order_quantity ) desc limit value
What are the name and phone of the customer with the most ordered product quantity ?