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In some databases, there are tables that are only used for data entry. One way of processing these tables is to upload all inserted rows at each synchronization, and remove them from the remote database on the download. After synchronization, the remote table is empty again, ready for another batch of data.
To achieve this model, you can upload rows into a temporary table and then insert them into a base table using an end_upload table script. The temporary table can be used in the download_delete_cursor to remove rows from the remote database following a successful synchronization.
Alternatively, you can allow the client application to the delete the rows, using the STOP SYNCHRONIZATION DELETE statement to stop the deletes being uploaded during the next synchronization.