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Query and Sum

Posted on 2011-09-06
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Last Modified: 2012-05-12
I am working on developing a query against Microsoft Project Server database.  I want the ability to calculate the amount of hours an individual will be working within a given period of time.  I've developed the code noted below. and it works, for the most part.  

However, as you will see, if a 'resource' has multiple tasks during that week, it will return that resource multiple times.  I was to return only 1 row for each individuals.

Here's what I need:
Resource Name                     Work Sum
V                                                44
W                                                20
M                                                14
B                                                 0

Can someone assist?
SELECT     MSP_EpmAssignment.AssignmentStartDate, MSP_EpmAssignment.AssignmentFinishDate, SUM(MSP_EpmAssignmentByDay_UserView.AssignmentWork) 
                      AS WorkSum, MSP_EpmResource_UserView.ResourceName
FROM         MSP_EpmAssignmentByDay_UserView INNER JOIN
                      MSP_EpmProject_UserView ON MSP_EpmAssignmentByDay_UserView.ProjectUID = MSP_EpmProject_UserView.ProjectUID INNER JOIN
                      MSP_EpmTask_UserView ON MSP_EpmAssignmentByDay_UserView.ProjectUID = MSP_EpmTask_UserView.ProjectUID AND 
                      MSP_EpmAssignmentByDay_UserView.TaskUID = MSP_EpmTask_UserView.TaskUID INNER JOIN
                      MSP_EpmAssignment ON MSP_EpmAssignmentByDay_UserView.AssignmentUID = MSP_EpmAssignment.AssignmentUID AND 
                      MSP_EpmAssignmentByDay_UserView.ProjectUID = MSP_EpmAssignment.ProjectUID AND 
                      MSP_EpmAssignmentByDay_UserView.TaskUID = MSP_EpmAssignment.TaskUID INNER JOIN
                      MSP_EpmResource_UserView ON MSP_EpmAssignment.ResourceUID = MSP_EpmResource_UserView.ResourceUID
GROUP BY MSP_EpmAssignment.AssignmentStartDate, MSP_EpmAssignment.AssignmentFinishDate, MSP_EpmResource_UserView.ResourceName
HAVING      (MSP_EpmAssignment.AssignmentStartDate >= CONVERT(DATETIME, '2011-08-28 00:00:00', 102)) AND 
                      (MSP_EpmAssignment.AssignmentFinishDate <= CONVERT(DATETIME, '2011-09-04 00:00:00', 102)) AND 
                      (NOT (MSP_EpmResource_UserView.ResourceName IS NULL))

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Question by:eciabattari
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3 Comments
 
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Expert Comment

by:markterry
ID: 36489826
Your problem is not the multiple tasks, but rather more clearly, the multiple start and finish dates.

You can build a table of weeks, and join to that table where assignment start and end date are withing that week, and group on week.
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LVL 6

Expert Comment

by:markterry
ID: 36489881
group on week instead of assignment start and end date i mean.

So that might look like

TableWeeks

Week                                       Start            End
2011-09-04 to 2011-09-10      2011-09-04  2011-09-10
etc.


Select Week, Sum(Amount) from tasks
inner join TablesWeek
on tasks.assigment_start  >= Week.Start
and task.assignment_end <= week.end


However, this will be a problem when an assignment lasts longer than a week, so maybe you only want to worry about the week start date only and call it WeekStarted.
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Accepted Solution

by:
markterry earned 500 total points
ID: 36489933
Shoot, I should also add into that, that even if it is just weekstart, you also have to say that assignment start less than weekend, and if it is definitively in a week, then also assignment end must be > week.start.

Only care about week start:
Select Week, Sum(Amount) from tasks
inner join TablesWeek
on tasks.assigment_Start  >= Week.Start
and task.assignment_Start <= week.end

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Must lie in a week:
Select Week, Sum(Amount) from tasks
inner join TablesWeek
on tasks.assigment_Start  >= Week.Start
and task.assignment_Start <= week.end
and tasks.assigment_End  >= Week.Start
and task.assignment_End <= week.end

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