This update FIELD2 with the first series of numbers from FIELD1:
UPDATE DUMMY_TABLE
SET FIELD2 = mid([FIELD1], 1, InStr([FIELD1], " "))
This remove the first series of numbers from FIELD2:
UPDATE DUMMY_TABLE
SET FIELD1 = mid([FIELD1], InStr([FIELD1], " ") + 1)
Perform these 2, changing FIELD2...