MPP-Task Usage view Vs MSP_EpmAssignmentByDay_UserView

Hi,

I'm trying to create a SSRS report in PWA site for display a data which is similar to Task Usage view in MPP (can see this view in below image). I wrote a following query in reporting DB to get this Task Usage views rollup data. 

Problem I could see here is that data from reporting DB is not maching up withTask Usage view for few projects(The data we are expecting in SSRS report should be similar data of  task usage view which is highlighted in screenshot)

Thank you in advance.

SELECT  
SUM(AssignmentBaseline0Work) AS BaselineWork,  
SUM([AssignmentActualWork]) AS ActualWork,
MONTH(TimeByDay) AS [Month],
YEAR(TimeByDay) AS [Year]
FROM  [MSP_EpmAssignmentByDay_UserView] 
GROUP BY MONTH(TimeByDay), YEAR(TimeByDay)

Thanks, Ram