Activity Table
ActivityID    UOMID    ProcessNam
---------------------------------------
1             2         Process1
2             1         Process2
3             null      Process3

UOM Table
UOMId         UOMText
-------------------------
   1           UOM1
   2           UOM2

ActivityID      UOMID       ProcessName     UOMText
1               2           Process1        UOM2
2               1           Process2        UOM1

3               null        Process3        null