To count total logins by a single user.

[saylee]

I have User Table, Sessions Table & one more table where there are user_id, session_id. 
I want to find out the total number of logins(sessions) a user has had. 

eg: a user has had 3 logins from same user_id so how can I count that? 

[ToddChitt]

You don't. Power BI does that for you if you have proper relationships set up between the User and Sessions tables. Simple create a Table visual with User ID from User, and COUNT of Session ID from Sessions.