* Data Creation;

data Emps;
   input First $ Gender $ HireYear;
   cards;
Stacey	F	2006
Gloria	F	2007
James	M	2007
;
run;

proc print data=Emps;
run;

data Emps2008;
   input First $ Gender $ HireYear;
   cards;
Brett	M	2008
Renee	F	2008
;
run;

proc print data=Emps2008;
run;


data Emps2009;
   input First $ HireYear;
   cards;
Sara	2009
Dennis	2009
;
run;

proc print data=Emps2009;
run;


data Emps2010;
   input First $ HireYear Country $;
   cards;
Rose	2010	Spain
Eric	2009	Spain
;
run;

proc print data=Emps2010;
run;

* Appending like-structured data sets;

proc append base=Emps
            data=Emps2008;
run;

proc print data=Emps;
run;

*Appending unlike structured data sets;

proc append base=Emps
            data=Emps2009;
run;

proc print data=Emps;
run;

proc append base=Emps
            data=Emps2010;
run;

proc print data=Emps;
run;

* Appending using FORCE;

proc append base=Emps
            data=Emps2010 force;
run;

proc print data=Emps;
run;