Use two tables who are relative to each other (if possible). Let's say column 1,2,3 is customerid, customername, customer address and 4, 5, 6 is some other data. If the customerid is not present in first table, add 1,2 and 3 to first table and the second table add only the customerid, skip 2 and 3 and add 4, 5, 6.
Charlize
