The tape modifier retrieves data from the currently attached tape, rather than the actual data level of the file. The tape must have been created in a t-dump format and must be positioned to the beginning of the appropriate tape file. The attribute-defining items specified in the AQL sentence are retrieved from the dictionary level of the specified file name.
This example assumes that the appropriate t-dump media has been attached and previously positioned at the proper tape file.
list invoices with date >= "1/1/04" and <= "12/31/04" tape