Top Performance Samples Collected (Report Dataset)

 /*Top performance samples collected
 Jonathan Almquist (https://blogs.technet.com/b/jonathanalmquist/)
 04-08-2011
 */
  
 DECLARE @RowCount AS INT,
     @MGID AS INT,
     @TimeZoneOffset AS INT,
     @OffSetDays AS INT,
     @StartDate AS DATE,
     @EndDate AS DATE
     
 SET @RowCount = 20
 SET @MGID = 1
 SET @TimeZoneOffset = 5
 SET @OffSetDays = 60
 SET @StartDate = DATEADD(hour, @TimeZoneOffset, DATEADD(day, -@OffSetDays, GETDATE()))
 SET @EndDate = DATEADD(hour, @TimeZoneOffset, GETDATE())
  
 SELECT TOP (@RowCount) SUM(vPD.SampleCount) AS 'Count',
         vPR.ObjectName AS 'Object',
         vPR.CounterName AS 'Counter',
         vRule.RuleDefaultName AS 'Rule',
         vMP.ManagementPackDefaultName AS 'MP'
 FROM  Perf.vPerfDaily AS vPD INNER JOIN
         vPerformanceRuleInstance AS vPRI ON vPRI.PerformanceRuleInstanceRowId = vPD.PerformanceRuleInstanceRowId INNER JOIN
         vPerformanceRule AS vPR ON vPR.RuleRowId = vPRI.RuleRowId INNER JOIN
         vRule ON vRule.RuleRowId = vPR.RuleRowId INNER JOIN
         vManagementPack AS vMP ON vMP.ManagementPackRowId = vRule.ManagementPackRowId INNER JOIN
         vManagedEntity AS vME ON vME.ManagedEntityRowId = vPD.ManagedEntityRowId INNER JOIN
         vManagementGroup AS vMG ON vMG.ManagementGroupRowId = vME.ManagementGroupRowId
 WHERE (vMG.ManagementGroupRowId = @MGID) AND (vPD.DateTime BETWEEN @StartDate AND @EndDate)
 GROUP BY vPR.ObjectName, vPR.CounterName, vRule.RuleDefaultName, vMP.ManagementPackDefaultName
 ORDER BY 'Count' DESC

Go to main page to download formatted TSQL scripts for all report dataset samples on my blog.