filter subset of same table based on not in filter

[power_roboter]

Hi,

I am looking for the correct dax syntax to get all users in my table who have the licenceType = "demo" && userRole= "customer" and at the same time do not have the licenceType = "full" && userRole= "customer". As a result I want to get a distinctcount of the users who only have the licenceType = "demo" and not licenceType = "full". I'm looking forward to your help...

| userId | userRole | licenceType | date | action

| a | customer | demo | 21.12.2019 | action

| a | customer | full | 22.12.2019 | action

| b | customer | demo | 22.12.2019 | action

| c | customer | demo | 22.12.2019 | action

| c | customer | full | 29.12.2019 | action

The result based on this sample should be 1.

[lbendlin · Accepted solution]

Here is a rough version.  May need some context refinement.

OnlyDemo = 
var fulls = SELECTCOLUMNS(CALCULATETABLE('Table','Table'[licenceType ]="full"),"id",'Table'[userId ])
var demos = SELECTCOLUMNS(CALCULATETABLE('Table','Table'[licenceType ]="demo"),"id",'Table'[userId ])
return countrows(except(demos,fulls))