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copied!<p>As <a href="https://stackoverflow.com/a/17095920/57611">Randy suggested</a>, you can just change <code>IN</code> to <code>NOT IN</code>. However, I would encourage you to start thinking in terms of JOINs and <code>EXISTS</code> (semi-joins):</p> <pre><code>SELECT A.* -- try to use explicit columns though instead of * FROM dbo.ActiveListing A WHERE Right(A.[seller-id], 4) <> '-XRU' --may improve performance AND NOT EXISTS ( -- this is actually an anti-semi-join SELECT * FROM dbo.Product P WHERE P.PurchaserID = 60741 AND Right(P.id, 4) = '-XRU' AND A.[seller-id] = P.id ) ; SELECT A.* -- try to use explicit columns though instead of * FROM dbo.ActiveListing A LEFT JOIN dbo.Product P ON P.PurchaserID = 60741 AND Right(P.id, 4) = '-XRU' AND A.[seller-id] = P.id WHERE Right(A.[seller-id], 4) <> '-XRU' --may improve performance AND P.id IS NULL ; </code></pre> <p>Note my addition that "may improve performance' also eliminates any <code>NULL</code> values, so adjust accordingly if <code>A.[seller-id]</code> can be <code>NULL</code>.</p> <p>If I have understood this backward and you want the rows from <code>Product</code> that aren't in <code>ActiveListing</code> we just flip the tables and conditions:</p> <pre><code>SELECT P.* -- try to use explicit columns though instead of * FROM dbo.Product P WHERE P.PurchaserID = 60741 AND Right(P.id, 4) = '-XRU' AND NOT EXISTS ( -- this is actually an anti-semi-join SELECT * FROM dbo.ActiveListing A WHERE P.id = A.[seller-id] ) ; SELECT P.* -- try to use explicit columns though instead of * FROM dbo.Product P LEFT JOIN dbo.ActiveListing A ON P.id = A.[seller-id] WHERE P.PurchaserID = 60741 AND Right(P.id, 4) = '-XRU' AND A.[seller-id] IS NULL ; </code></pre>

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