What action should be taken to minimize the number of rows added to the Orders table during refreshes?

To minimize the number of rows added to the Orders table during refreshes, using a dataflow to retrieve the maximum OrderID is an effective approach. This method allows for the identification of the most recent entry in the Orders table, ensuring that only new records—those that have an OrderID higher than this maximum—are processed during the update.

By focusing on the maximum OrderID, you limit the data retrieval process to just those entries that haven't been included previously, which conserves resources and improves efficiency. Since the dataflow is set up to track the highest OrderID from the last update, it effectively acts as a checkpoint, preventing any unnecessary duplication of data and ensuring that the refresh operation is streamlined.

This approach stands in contrast to merely filtering by a minimum OrderID or retrieving the maximum value without specifying OrderID, as these strategies may not effectively isolate only new or relevant records from the dataset. Instead, they could lead to excess data being processed, undermining the goal of minimizing added rows.