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# LastOrder.sql
SELECT customers.customerNumber
, customerName
, orderDate AS LastOrderDate
, ( SELECT CAST( SUM(quantityOrdered * priceEach) AS DECIMAL(8,2) )
FROM `orderdetails`
WHERE orderdetails.orderNumber = orders.orderNumber
) AS OrderTotal
FROM `customers`
JOIN `orders` ON orders.customerNumber = customers.customerNumber
WHERE orderDate = ( SELECT MAX(orderDate)
FROM `orders` AS o
JOIN customers AS c ON c.customerNumber = o.customerNumber
WHERE c.customerNumber = customers.customerNumber
GROUP BY c.customerNumber
)
ORDER BY customerName
;
-- OR --
# LastOrder.sql
SELECT customers.customerNumber
, customerName
, orderDate AS LastOrderDate
, CAST( SUM(quantityOrdered * priceEach) AS DECIMAL(8,2) ) AS OrderTotal
FROM `customers`
JOIN `orders` ON orders.customerNumber = customers.customerNumber
JOIN `orderdetails` ON orderdetails.orderNumber = orders.orderNumber
WHERE orderDate = ( SELECT MAX(orderDate)
FROM `orders` AS o
JOIN customers AS c ON c.customerNumber = o.customerNumber
WHERE c.customerNumber = customers.customerNumber
GROUP BY c.customerNumber
)
GROUP BY orders.orderNumber
ORDER BY customerName
;
-- OR --
# LastOrder.sql
SELECT customers.customerNumber
, customerName
, orderDate AS LastOrderDate
, CAST( SUM(quantityOrdered * priceEach) AS DECIMAL(8,2) ) AS OrderTotal
FROM `orderdetails`
JOIN `orders` ON orders.orderNumber = orderdetails.orderNumber
JOIN `customers` ON customers.customerNumber = orders.customerNumber
WHERE orderDate = ( SELECT MAX(orderDate)
FROM `orders` AS o
JOIN customers AS c ON c.customerNumber = o.customerNumber
WHERE c.customerNumber = customers.customerNumber
GROUP BY c.customerNumber
)
GROUP BY orders.orderNumber
ORDER BY customerName
;