Execution Time - SSRS

="Execution Time: " +
IIf(System.DateTime.Now.Subtract(Globals!ExecutionTime).TotalSeconds <> 0, System.DateTime.Now.Subtract(Globals!ExecutionTime).Hours & " hour(s), ", "") +
IIf(System.DateTime.Now.Subtract(Globals!ExecutionTime).Minutes > 0, System.DateTime.Now.Subtract(Globals!ExecutionTime).Minutes & " minute(s), ", "") +
IIf(System.DateTime.Now.Subtract(Globals!ExecutionTime).Seconds > 0, System.DateTime.Now.Subtract(Globals!ExecutionTime).Seconds & " second(s)", ""))
)

Report Execution - SSRS

--run against ReportServer
USE
ReportServer
GO
SELECT
dbo.Catalog.Name, dbo.Catalog.Path, dbo.ExecutionLog.UserName, dbo.ExecutionLog.TimeStart, dbo.ExecutionLog.TimeEnd,
dbo.ExecutionLog.TimeDataRetrieval, dbo.ExecutionLog.TimeProcessing, dbo.ExecutionLog.TimeRendering, dbo.ExecutionLog.Format,
dbo.ExecutionLog.Parameters, dbo.ExecutionLog.Status
FROM
dbo.Catalog INNER JOIN
dbo.ExecutionLog ON dbo.Catalog.ItemID = dbo.ExecutionLog.ReportID
ORDER BY
dbo.ExecutionLog.TimeStart DESC
-----sum use
USE
ReportServer
GO
SELECT
dbo.ExecutionLog.UserName, COUNT(dbo.ExecutionLog.UserName)
FROM
dbo.Catalog INNER JOIN
dbo.ExecutionLog ON dbo.Catalog.ItemID = dbo.ExecutionLog.ReportID
GROUP BY
dbo.ExecutionLog.UserName
ORDER BY
COUNT(dbo.ExecutionLog.UserName)DESC