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POGet mutually and non mutually existening Fields in same table in Two columns
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2010-03-15T22:56:55.660
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2017-05-23T12:33:40.673
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This is a question similar to another question I posted <a href="https://stackoverflow.com/questions/2444109/how-to-check-for-mutual-existence-of-fields-in-same-table-in-two-columns">here</a> but is a little different. I am trying to get a list of all instances of mutual and non-mutual existing Users. What I mean is that the returned result from the query will return a list of users along with their co-worker. It is similar to the question <a href="https://stackoverflow.com/questions/2444109/how-to-check-for-mutual-existence-of-fields-in-same-table-in-two-columns">here</a>, but the difference is that non mutual users will be returned too and with out the "duplicity" mutually existing users return in the list (See image below in-order simplify it all). I took the original answer from <a href="https://stackoverflow.com/questions/2444109/how-to-check-for-mutual-existence-of-fields-in-same-table-in-two-columns/2444442#2444442">Thomas</a> (Thanx again Thomas) <code>Select D1.u_username, U1.Permission, U1.Grade, D1.f_username, U2.Permission, U2.Grade from tblDynamicUserList As D1     Join tblDynamicUserList As D2         On D2.u_username = D1.f_username             And D2.f_username = D1.u_username     Join tblUsers As U1         On U1.u_username = D1.u_username     Join tblUsers As U2         On U2.u_username = D2.u_username </code> and after several trials I commented out 2 lines (Below). The returned results are what I am trying to accomplish, as described in the beginning of this question, except for the "duplicity" returned by mutually existing users in the table. How can I eliminate this duplicity? <code>Select D1.u_username, U1.Permission, U1.Grade, D1.f_username, U2.Permission, U2.Grade from tblDynamicUserList As D1     Join tblDynamicUserList As D2         On D2.u_username = D1.f_username             /* And D2.f_username = D1.u_username /     Join tblUsers As U1         On U1.u_username = D1.u_username     Join tblUsers As U2         On U2.u_username = D2.u_username / WHERE D1.U_userName < D1.f_username */ </code> *Screenshot that hopefully helps explain it all. <a href="http://www.marketing2go.co.il/SqlQuestion.jpg" rel="nofollow noreferrer">http://www.marketing2go.co.il/SqlQuestion.jpg</a> Here are the results of the updated query (with the 2 lines commented out) <a href="http://www.marketing2go.co.il/QueryResults.jpg" rel="nofollow noreferrer">http://www.marketing2go.co.il/QueryResults.jpg</a> The required results should be without rows 1 and 2 (or without rows 3 and 5), because they are in effect, a duplicity. That is because that pair exist in rows 3 and 5 (the order of the names in each pair is irrelevant). For a lack of a better word, it's more like a logical duplicity. Many thanx in advance 
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<sql-server-2005><tsql>
Title
Get mutually and non mutually existening Fields in same table in Two columns
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1. PO
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1. COIt might help more to show your prefered output, people can aim to get the results you want.
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 POGet mutually and non mutually existening Fields in same table in Two columns
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