I have a cust.dbf and an orders.dbf. The key of cust.dbf is custkey. The key of orders.dbf is custkey, orderseq. There is region field that is on both tables (I know, bad design), that has gotten out of sync between the customer and order tables. I want to find and replace the orders.region with the cust.region where cust.custkey = orders.custkey and cust.region != orders.region.