Something like:
select "empID","fName","lName","employmentStatusCode", "fName" + ' ' + "lName" AS FullName from "dbo"."Employee" as "Employee"
You'll get an InfoPath warning that the SQL can't be represented as a tree, tell the warning box you are okay with that. You'll also get a warning about potentially unsafe queries, you can tell InfoPath that you are okay with that too....