The RMU Unload command copies data from a specified table or view
    and places it in a specially structured file or in an RMS file.
    Be aware that the RMU Unload command does not remove data from
    the specified table; it merely makes a copy of the data.

    The RMU Unload command can be used to do the following:

    o  Extract data for an application that cannot access the Oracle
       Rdb database directly.

    o  Create an archival copy of data.

    o  Perform restructuring operations.

    o  Sort data by defining a view with a sorted-by clause, then
       unloading that view.

    The specially structured files created by the RMU Unload command
    contain metadata for the table that was unloaded. The RMS files
    created by the RMU Unload command contain only data; the metadata
    can be found either in the data dictionary or in the .rrd file
    created using the Record_Definition qualifier. Specify the
    Record_Definition qualifier to exchange data with an application
    that uses RMS files.

    The LIST OF BYTE VARYING (segmented string) data type cannot be
    unloaded into an RMS file; however, it can be unloaded into the
    specially structured file type.

    Data type conversions are valid only if Oracle Rdb supports the
    conversion.

    The RMU Unload command executes a read-only transaction to gather
    the metadata and user data to be unloaded. It is compatible with
    all operations that do not require exclusive access.