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POHow to SELECT the last user logged on to a computer given the Computer, User and LogonTime
 

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  1. POHow to SELECT the last user logged on to a computer given the Computer, User and LogonTime
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    <p>If I run this query to get a list of users logged on to each computer:</p> <pre><code>SELECT T0.Computer, T4.[User], T4.[Last Modified] FROM Table1 T0 LEFT OUTER JOIN Table4 T4 ON T0.Guid = T4.Guid Where T4.[Last Modified] &gt;= getdate()-30 -- Logged in the last 30 days ORDER BY T4.[Last Modified] DESC </code></pre> <p>I get:</p> <pre><code>Computer User Last Modified -------- ----- -------------- Comp1 UserA 2013-07-14 16:31:59.000 Comp1 UserB 2013-06-03 13:43:32.000 Comp1 UserC 2013-04-28 15:58:22.000 Comp2 UserD 2013-04-28 11:10:21.000 Comp2 UserE 2013-04-19 15:01:33.000 Comp3 UserF 2013-04-18 08:01:03.000 </code></pre> <p>I would like to show the MAX([Last Modified]) to show only the last user to log on to each computer:</p> <pre><code>Computer User -------- ----- Comp1 UserA Comp2 UserD Comp3 UserF </code></pre> <p>It would make sense to say SELECT DISTINCT Computer, User ORDER BY [Last Modified] DESC But you can't use ORDER BY without specifying it in the SELECT.</p> <p>And MAX([Last Modified]) would only work if the User wasn't in the SELECT.</p> <hr> <p>Thanks @Lamak</p> <p>Is it possible to Pivot the Results to show the last two users? We could change the Row number to User1, User2, etc.:</p> <pre><code>RN = 'User' + CAST(ROW_NUMBER() OVER(PARTITION BY T0.Name ORDER BY T4.[Last Modified] DESC) AS VarChar) </code></pre> <p>Then the results could show:</p> <pre><code>Computer User1 User2 -------- ----- ----- Comp1 UserA UserB Comp2 UserD UserE Comp3 UserF NULL or '' </code></pre>
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    1. COUpdated my answer with your new requirement
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