/********************************************************************
 * Programmer: Alan Neustadtl                        Date: 10-02-00 *
 *                                                                  *
 * This program demonstrates the how to interleave two SAS data     *
 *   sets.                                                          *
 *                                                                  *
 ********************************************************************/

data f1;
input year;
datalines;
1984
1985
1986
1987
1988
;
proc print;
run;

data f2;
input year;
datalines;
1984
1984
1988
;
proc print;
run;

data interl1;
set f1 f2;
   by year;
proc print;
run;