The following programs demonstrate the use of the MATCHING
    conditional expression and the SORTED clause. These programs
    create a record stream containing all the records in the
    EMPLOYEES relation in which the field LAST_NAME begins with the
    letter "R". Then the programs sort the record stream in ascending
    numerical order of the employee IDS. These programs print, in
    numerical order, the employee ID, followed by the last name and
    first name for all the records in the record stream.