One way I get around this is having an append only version of the main table, and then a "most current record" version of the table. My append only table will b

One way I get around this is having an append only version of the main table, and then a "most current record" version of the table. My append only table will be a running record of all the data I've loaded unmodified. Then I run a create table as select statement against my append only table to generate my new version of the final table. So in essence, I'm "deleting" the old version of the record by omitting it when I create my new version of the final table.