Writing a query is an art! Simplicity, focus, and practice is all it takes. Understand the logical processing of a query and discover the art of writing simple and efficient queries. It is a journey that starts with FROM and ends with ORDER BY!

3. SELECT C.customer_name,
SUM(O.order_amount) AS total
FROM Customers AS C
JOIN Orders AS O
ON C.customer_nbr = O.customer_nbr
WHERE C.customer_name LIKE 'J%'
AND O.order_date >= '20090101'
AND O.order_date < '20100101'
GROUP BY C.customer_name
HAVING SUM(O.order_amount) > 10
ORDER BY total DESC;

4. SELECT C.customer_name,
SUM(O.order_amount) AS total
FROM Customers AS C
JOIN Orders AS O
ON C.customer_nbr = O.customer_nbr
WHERE C.customer_name LIKE 'J%'
AND O.order_date >= '20090101'
AND O.order_date < '20100101'
GROUP BY C.customer_name
HAVING SUM(O.order_amount) > 10
ORDER BY total DESC;

17. SELECT C.customer_name,
SUM(O.order_amount) AS total
FROM Customers AS C
JOIN Orders AS O
ON C.customer_nbr = O.customer_nbr
WHERE C.customer_name LIKE 'J%'
AND O.order_date >= '20090101'
AND O.order_date < '20100101'
GROUP BY C.customer_name
HAVING SUM(O.order_amount) > 10
ORDER BY total DESC;