USE AdventureWorks2008R2;
GO
-- Define the CTE expression name and column list.
WITH
	Sales_CTE
	(
		SalesPersonID,
		SalesOrderID,
		SalesYear
	)
	AS
	-- Define the CTE query.
	(
		SELECT
			SalesPersonID,
			SalesOrderID,
			YEAR(OrderDate) AS SalesYear
		FROM
			Sales.SalesOrderHeader
		WHERE SalesPersonID IS NOT NULL
	)
-- Define the outer query referencing the CTE name.
SELECT
	SalesPersonID,
	COUNT(SalesOrderID) AS TotalSales,
	SalesYear
FROM
	Sales_CTE
GROUP BY SalesYear, SalesPersonID
ORDER BY SalesPersonID, SalesYear;
GO