Hi, I have several projects with different tasks for each. I have 3 fields [fkProjectsID], [TaskOrder] and [Duration] in a table for project tracking with that structure:
[fkProjectsID] [TaskOrder] [Duration]
1 /1 /5
1 /2 /8
1 /3 /15
1 /4 /6
2 /1 /8
2 /2 /30
2 /3 /25
I want to calculate cumulative values stored in [Duration] field (represent a number of days). I'm using the field [TaskOrder] to order different tasks within each project. With some testing, I was able to calculate cumulative [Duration] with 1 project using the DSum fucntion as following:
CumulDuration: DSum("[Duration]", "[tblProjectTracking]", "[TaskOrder]<=" & [TaskOrder])
I was having the sequence: 5, 13, 28, 34 for respectively Task 1,2,3,4. However, when I add a second project (and then a third...), I need to be able to filter based on [fkProjectsID] as well (i.e. a specific DSum by ProjectsID). I add this criteria but I get the sum of [Duration] on each row instead of the cumulative:
CumulDuration: DSum("[Duration]","[tblProjectTracking]","[TaskOrder]<=" & [TaskOrder] And "[fkProjectsID]=" & [fkProjectsID])
Thanks for the help.
[fkProjectsID] [TaskOrder] [Duration]
1 /1 /5
1 /2 /8
1 /3 /15
1 /4 /6
2 /1 /8
2 /2 /30
2 /3 /25
I want to calculate cumulative values stored in [Duration] field (represent a number of days). I'm using the field [TaskOrder] to order different tasks within each project. With some testing, I was able to calculate cumulative [Duration] with 1 project using the DSum fucntion as following:
CumulDuration: DSum("[Duration]", "[tblProjectTracking]", "[TaskOrder]<=" & [TaskOrder])
I was having the sequence: 5, 13, 28, 34 for respectively Task 1,2,3,4. However, when I add a second project (and then a third...), I need to be able to filter based on [fkProjectsID] as well (i.e. a specific DSum by ProjectsID). I add this criteria but I get the sum of [Duration] on each row instead of the cumulative:
CumulDuration: DSum("[Duration]","[tblProjectTracking]","[TaskOrder]<=" & [TaskOrder] And "[fkProjectsID]=" & [fkProjectsID])
Thanks for the help.