Outer Join in MS Query

SELECT UffMacBen.`FIRST NAME`, UffMacBen.`LAST NAME`, UffMacBen.MAC_EMPLID, UffMacBen_Original.`FIRST NAME`, UffMacBen_Original.`LAST NAME`, UffMacBen_Original.MAC_EMPLID, UffMacBen.`FIRST NAME` FROM {oj `U:\uweb\members\2009\UFFmacBEN_09032009_copy`.UffMacBen UffMacBen LEFT OUTER JOIN `U:\uweb\members\2009\UFFmacBEN_09032009_copy`.UffMacBen_Original UffMacBen_Original ON UffMacBen.MAC_EMPLID = UffMacBen_Original.MAC_EMPLID} WHERE (UffMacBen_Original.MAC_EMPLID Is Null) UNION SELECT UffMacBen.`FIRST NAME`, UffMacBen.`LAST NAME`, UffMacBen.MAC_EMPLID, UffMacBen_Original.`FIRST NAME`, UffMacBen_Original.`LAST NAME`, UffMacBen_Original.MAC_EMPLID, UffMacBen.`FIRST NAME` FROM {oj `U:\uweb\members\2009\UFFmacBEN_09032009_copy`.UffMacBen_Original UffMacBen_Original LEFT OUTER JOIN `U:\uweb\members\2009\UFFmacBEN_09032009_copy`.UffMacBen UffMacBen ON UffMacBen_Original.MAC_EMPLID = UffMacBen.MAC_EMPLID} WHERE (UffMacBen.MAC_EMPLID Is Null)