/* 03a - Subset variables */

libname y "y:\sas\data";

* KEEP/DROP - selecting variables;

data subset1;
	set y.employees;
	keep salary salbegin;
	run;

proc means; run;


data subset2;
	set y.employees(keep=salary salbegin);
	run;

proc means; run;

data subset3(keep=salary salbegin);
	set y.employees;
	 salaryincrease = salary - salbegin;
	run;

proc means; run;

proc means data=y.employees(keep=salary salbegin); 
run;