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?
CREATE TABLE `Addresses` (
`address_id` INTEGER PRIMARY KEY,
`line_1_number_building` VARCHAR(80),
`city` VARCHAR(50),
`zip_postcode` VARCHAR(20),
`state_province_county` VARCHAR(50),
`country` VARCHAR(50)
);
CREATE TABLE `Products` (
`product_id` INTEGER PRIMARY KEY,
`product_type_code` VARCHAR(15),
`product_name` VARCHAR(80),
`product_price` DOUBLE NULL
);
CREATE TABLE `Customers` (
`customer_id` INTEGER PRIMARY KEY,
`payment_method_code` VARCHAR(15),
`customer_number` VARCHAR(20),
`customer_name` VARCHAR(80),
`customer_address` VARCHAR(255),
`customer_phone` VARCHAR(80),
`customer_email` VARCHAR(80)
);
CREATE TABLE `Contacts` (
`contact_id` INTEGER PRIMARY KEY,
`customer_id` INTEGER NOT NULL,
`gender` VARCHAR(1),
`first_name` VARCHAR(80),
`last_name` VARCHAR(50),
`contact_phone` VARCHAR(80)
);
CREATE TABLE `Customer_Address_History` (
`customer_id` INTEGER NOT NULL,
`address_id` INTEGER NOT NULL,
`date_from` DATETIME NOT NULL,
`date_to` DATETIME,
FOREIGN KEY (`customer_id` ) REFERENCES `Customers`(`customer_id` ),
FOREIGN KEY (`address_id` ) REFERENCES `Addresses`(`address_id` )
);
CREATE TABLE `Customer_Orders` (
`order_id` INTEGER PRIMARY KEY,
`customer_id` INTEGER NOT NULL,
`order_date` DATETIME NOT NULL,
`order_status_code` VARCHAR(15),
FOREIGN KEY (`customer_id` ) REFERENCES `Customers`(`customer_id` )
);
CREATE TABLE `Order_Items` (
`order_item_id` INTEGER NOT NULL ,
`order_id` INTEGER NOT NULL,
`product_id` INTEGER NOT NULL,
`order_quantity` VARCHAR(80),
FOREIGN KEY (`product_id` ) REFERENCES `Products`(`product_id` ),
FOREIGN KEY (`order_id` ) REFERENCES `Customer_Orders`(`order_id` )
);
INSERT INTO Addresses (`address_id`, `line_1_number_building`, `city`, `zip_postcode`, `state_province_county`, `country`) VALUES (1, '4315 Kerluke Canyon Apt. 800', 'Hertafurt', '740', 'Nevada', 'USA');
INSERT INTO Products (`product_id`, `product_type_code`, `product_name`, `product_price`) VALUES (1, 'Hardware', 'Apple', '54753982.574522');
INSERT INTO Customers (`customer_id`, `payment_method_code`, `customer_number`, `customer_name`, `customer_address`, `customer_phone`, `customer_email`) VALUES (1, 'Credit Card', '456', 'Kayley', '636 Chanelle Isle Apt. 846', '+87(9)5279161988', 'antonette73@example.com');
INSERT INTO Contacts (`contact_id`, `customer_id`, `gender`, `first_name`, `last_name`, `contact_phone`) VALUES (1, 4, 'male', 'Cierra', 'Collins',  '+73(2)0854391820');
INSERT INTO Customer_Address_History (`customer_id`, `address_id`, `date_from`, `date_to`) VALUES (12, 7, '2015-07-23 14:37:18', '2018-03-07 12:04:20');
INSERT INTO Customer_Orders (`order_id`, `customer_id`, `order_date`, `order_status_code`) VALUES (1, 2, '2009-07-19 13:40:49', 'Completed');
INSERT INTO Order_Items (`order_item_id`, `order_id`, `product_id`, `order_quantity`) VALUES (1, 9, 15, '3');