Returning Users Field/Measure

Hi all,

I'm trying to figure out the easiest way to do this, and I'm having trouble figuring out how to do this.

I've got a column with DATE and a list of User IDs (multiple lines with multiple user IDs).

I'm trying to rend returning users and can't figure out how to plot/identify "returning users" by day. Is there a measure that I can use to calculate returning users? I tried this, but it didn't work. Any ideas? 

Users Returning=

COUNTROWS (

    CALCULATETABLE (

        VALUES ( User ID ),

        VALUES ( User ID ),

        FILTER (

            ALL ( Date Table ),

            <date_column> < MIN ( <date_column> )

        )

    )

)