SELECT d.Item
FROM (
	SELECT 
		a.Item, 
		Vendor_Code
	FROM Purch_Inv_Line a
	INNER JOIN Purch_Inv_Header a 
	ON a.[Document No_] = b.Item 
		AND b.[Posting Date] BETWEEN '2010-01-01' AND '2010-12-31'
	GROUP BY a.Item, Vendor_Code 
) d
GROUP BY d.Item
HAVING COUNT(*) > 1

SELECT 
	a.Item, 
	Vendor_Code, 
	vc = DENSE_RANK() OVER(PARTITION BY Item ORDER BY Vendor_Code) 
FROM Purch_Inv_Line a
INNER JOIN Purch_Inv_Header a 
ON a.[Document No_] = b.Item 
	AND b.[Posting Date] BETWEEN '2010-01-01' AND '2010-12-31'
	

Far away is close at hand in the images of elsewhere.

Anon.