You do not need to call the Update method after modifying records in batch mode. If you omit the Update method, ADO will automatically call it when the record set is repositioned. The Update method will place the record in the list of records that have pending changes. You must call the UpdateBatch method later to send a single update request to the server for the pending records. You can also call the CancelBatch method if you wish to cancel the changes for all the pending records.