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BOOK: Beginning SQL Server 2005 Programming ISBN: 978-0-7645-8433-6
This is the forum to discuss the Wrox book Beginning SQL Server 2005 Programming by Robert Vieira; ISBN: 9780764584336
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Old January 24th, 2007, 05:22 PM
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Default Beg. SQL Programming Chapter 7 Exercise Quest 3

Here's the exercise problem from Chapter 7, exercise 3 (for the Northwind database):

Show the five most recent orders that were purchased from a customer who has spent more
than $25,000 with Northwind.

The T-SQL Answer provided in the book (shown below), doesn't show the order information, only the CustomerID. How can I show the Order Number as well? If I simply add "o.OrderID" to the subquery, I get the following error:

Msg 8120, Level 16, State 1, Line 1
Column 'Orders.OrderID' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
Msg 116, Level 16, State 1, Line 1
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

Here is the T-SQL answer as provided in the book:

FROM Orders oo
SELECT c.CustomerID
FROM Customers c
JOIN Orders o
ON c.CustomerID = o.CustomerID
JOIN [Order Details] od
ON o.OrderID = od.OrderID
GROUP BY c.CustomerID
HAVING SUM(UnitPrice * (1-Discount) * Quantity) > 25000
ORDER BY OrderDate

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