Dax "Puzzle" 2 - Help with virtual Table

[campelliann]

Project Table

Project	Beginning Date	End Date
Project A	1 jun	5jun
Project B	1april	10 april

(Virtual Table)

Project	Beginning Date	End Date	Total Days
Project A	1 jun	5jun	5
Project B	1april	10 april	10

So I need to create a virtual Table where I add a column with the total days for each project, something along these lines:

var virtual table: ADDCOLUMNS(Project Table, "@Total Days", Countrows(datesbetween(Dates, Selectedvalue(Beginning Date),Selectedvalue( End date),) 

Then I want to sum the newly virtual column, that in this particular case would be 5+10 = 15,

I tried with a variable "current_project" to make the Datesbetween work, and get the total days for each project row by row. But the measure does not work in the totals, and in the charts only works If I place "Project" as legend.... If I do not filter per project, it does not work.

Any help?

Many thanks

[lbendlin · Accepted solution]

You were close. Here's your measure

Total Days = int(SUMX(ADDCOLUMNS('Project Table',"Days",'Project Table'[End Date]-'Project Table'[Beginning Date]+1),[Days]))