嵌套SQL语句2

Question

此代码中存在哪些表？

SELECT
    ProjectUID, 
    ProjectName, 
FROM
    (SELECT 
         MSP_TimesheetPeriod.PeriodName AS PeriodName, 
         MSP_TimesheetPeriod.PeriodUID AS PeriodUID, 
     FROM 
         (SELECT 
              MSP_TimesheetLine.TimesheetLineUID,
              MSP_TimesheetActual.TimeByDay AS TimeByDay,    --
              SUM(MSP_TimesheetActual.PlannedWork) AS PlannedWork, 
          FROM 
              dbo.MSP_TimesheetLine
          LEFT OUTER JOIN 
              dbo.MSP_TimesheetActual ON MSP_TimesheetLine.TimesheetLineUID = MSP_TimesheetActual.TimesheetLineUID) AS TimesheetLineData 
     INNER JOIN 
         dbo.MSP_TimesheetLine ON MSP_TimesheetLine.TimesheetLineUID = TimesheetLineData.TimesheetLineUID) AS MSP_TimesheetLine_UserView
INNER JOIN
    MSP_TimesheetLine_OlapView AS ov ON MSP_TimesheetLine_UserView.TimesheetLineUID = ov.TimesheetLineUID