The problem with the preceding output is that your report contains display variables. As character variables, Orig and Dest are defined as display variables by default.

All of the variables in a summary report must be defined as group, analysis, across, or computed variables. This is because PROC REPORT must be able to summarize all variables across an observation in order to collapse observations. If PROC REPORT can't create groups, it displays group variables as order variables.


Revising the Report

To group data in your report, you need to define the character variables (Flight, Orig, and Dest) as group variables, as shown below:

     proc report data=flights.europe nowd headline headskip;
        where dest in ('LON','PAR');
        column flight orig dest mail freight revenue;
        define revenue / format=dollar15.2;
        define flight / group 'Flight/Number' width=6 center;
        define orig / group width=6 spacing=5 'Flight/Origin'
                      center;
        define dest / group width=11 spacing=5
                     'Flight/Destination' center;
     run;

Now PROC REPORT can create groups, and your summary report displays the total mail, freight, and revenue by flight number. Remember that the default statistic for the analysis variables is SUM.