Digging into ReportServer Database

I was looking for some information about my ReportServer database and ran across a great script by Scott Hebert that displays a lot of useful information:

http://sqlninja.blogspot.com/2009/01/querying-reportserver-database.html

USE ReportServer

SELECT
         CatalogParent.Name ParentName,
         Catalog.Name ReportName,
         ReportCreatedByUsers.UserName ReportCreatedByUserName,
         Catalog.CreationDate ReportCreationDate,
         ReportModifiedByUsers.UserName ReportModifiedByUserName,
         Catalog.ModifiedDate ReportModifiedDate,
         CountExecution.CountStart TotalExecutions,
         ExecutionLog.InstanceName LastExecutedInstanceName,
         ExecutionLog.UserName LastExecutedUserName,
         ExecutionLog.Format LastExecutedFormat,
         ExecutionLog.TimeStart LastExecutedTimeStart,
         ExecutionLog.TimeEnd LastExecutedTimeEnd,
         ExecutionLog.TimeDataRetrieval LastExecutedTimeDataRetrieval,
         ExecutionLog.TimeProcessing LastExecutedTimeProcessing,
         ExecutionLog.TimeRendering LastExecutedTimeRendering,
         ExecutionLog.Status LastExecutedStatus,
         ExecutionLog.ByteCount LastExecutedByteCount,
         ExecutionLog.[RowCount] LastExecutedRowCount,
         SubscriptionOwner.UserName SubscriptionOwnerUserName,
         SubscriptionModifiedByUsers.UserName SubscriptionModifiedByUserName,
         Subscriptions.ModifiedDate SubscriptionModifiedDate,
         Subscriptions.Description SubscriptionDescription,
         Subscriptions.LastStatus SubscriptionLastStatus,
         Subscriptions.LastRunTime SubscriptionLastRunTime
   FROM
         dbo.Catalog
         JOIN         dbo.Catalog CatalogParent
         ON Catalog.ParentID = CatalogParent.ItemID
         JOIN
         dbo.Users ReportCreatedByUsers
         ON Catalog.CreatedByID = ReportCreatedByUsers.UserID
         JOIN         dbo.Users ReportModifiedByUsers
         ON Catalog.ModifiedByID = ReportModifiedByUsers.UserID
         LEFT JOIN
   (
   SELECT
            ReportID,
            MAX(TimeStart) LastTimeStart
      FROM
            dbo.ExecutionLog
      GROUP BY
            ReportID
   ) LatestExecution
         ON Catalog.ItemID = LatestExecution.ReportID
         LEFT JOIN   (
   SELECT
            ReportID,
            COUNT(TimeStart) CountStart
      FROM
            dbo.ExecutionLog
      GROUP BY
            ReportID
   ) CountExecution
         ON Catalog.ItemID = CountExecution.ReportID
         LEFT JOIN         dbo.ExecutionLog
         ON LatestExecution.ReportID = ExecutionLog.ReportID
      AND LatestExecution.LastTimeStart = ExecutionLog.TimeStart
         LEFT JOIN         dbo.Subscriptions
         ON Catalog.ItemID = Subscriptions.Report_OID
         LEFT JOIN         dbo.Users SubscriptionOwner
         ON Subscriptions.OwnerID = SubscriptionOwner.UserID
         LEFT JOIN         dbo.Users SubscriptionModifiedByUsers
         ON Subscriptions.ModifiedByID = SubscriptionModifiedByUsers.UserID
   ORDER BY
         CatalogParent.Name,
         Catalog.Name