What is the name of the customer that has purchased the most items?
CREATE TABLE order_items (
    order_id VARCHAR,
    order_quantity INTEGER
)

CREATE TABLE customer_orders (
    customer_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE customers (
    customer_name VARCHAR,
    customer_id VARCHAR
)
SELECT t1.customer_name FROM customers AS t1 JOIN customer_orders AS t2 ON t1.customer_id = t2.customer_id JOIN order_items AS t3 ON t2.order_id = t3.order_id GROUP BY t1.customer_name ORDER BY SUM(t3.order_quantity) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the name of the customer that has purchased the most items? ### Input: CREATE TABLE order_items (
    order_id VARCHAR,
    order_quantity INTEGER
)

CREATE TABLE customer_orders (
    customer_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE customers (
    customer_name VARCHAR,
    customer_id VARCHAR
) ### Response: SELECT t1.customer_name FROM customers AS t1 JOIN customer_orders AS t2 ON t1.customer_id = t2.customer_id JOIN order_items AS t3 ON t2.order_id = t3.order_id GROUP BY t1.customer_name ORDER BY SUM(t3.order_quantity) DESC LIMIT 1