FYI: I kept that statement as a subquery because this is the actual statement I am using in my database:
SELECT DISTINCT UnionTable.Name, UnionTable.EmpNumb
FROM (
SELECT Name, 99999 AS EmpNumb, 1 AS Origin FROM [SS Driving]
UNION
SELECT Name, 99999 AS EmpNumb, 2 AS Origin FROM [SS Training]...