Hello,  In the practice exam i came across this programming question about sorting. my answer was : data results.output27a; set cert.input27; country=upcase(country); if country in("US"); run; proc sort data=output27a; by state descending postal_code employee_id; run; which gave the answer for employee_id in obs 100 is 121030   but the correct answer was 120781 which used in code proc sort data=cert.input27 out=results.output27a(where=(upcase(country)='US'));   by state descending Postal_Code employee_ID; run;   ... View more