Dynamic Lookup Table

[tohare85]

I am trying to create a lookup table that will contain 2 columns (projectID, activeMonth) from a main table of Projects that lists start and end dates (could be empty if project is still active). I want a lookup table that will tell me if the project was active during a specific month (up to 48 months back from date of report). I know how I would programtically iterate through each project row then check if it was active during any of the past 48 month, however, I can't think about how I would do this with DAX. If a project was only active for 3 months then it will only have 3 rows in the ActiveMonth table. Any ideas? Thanks!

[Ashish_Mathur]

Hi @tohare85

This should be doable using Query Editor and DAX formulas.  Share a dataset and show the expected result.

[stretcharm · Accepted solution]

Sounds a similar problem to this post

http://community.powerbi.com/t5/Desktop/Help-needed-graphing-a-count-between-a-date-range/m-p/307250...

@parry2kprovided a solution that could be adapted to meet your needs.

[tohare85]

Thanks @stretcharm. Reaching out to @parry2k to see how to change the granularity of his solution.