Ok, so I want to execute this query:

Select user_id, f_name, l_name
from tableABC;

And I want it to return in this format:

abc123, Joe, Smith
sid938, Mel, Ward
iic837, Al, Jamison

I want the returned fields to be separated by commas. How would I modify the sql query to make this happen? I've seen it done elsewhere, but I'm not a dba guy and thought someone here might be able to quickly tell me how to do this.

Not sure if it matters, but this is on sql server.

Thanks!