data _null_;
   merge Summer_prdtot2(in=in_original)
         Summer_prdtot3(in=in_updated
                        rename=(Actual=New_Actual Predict=New_Predict
                                Country=New_Country ProdType=New_ProdType));
   by Date;
   array OldN {2} Actual Predict;
   array NewN {2} New_Actual New_Predict;
   array OldC {2} Country ProdType;
   array NewC {2} New_Country New_ProdType;
   file print;
   title1 "Differences between Two Data Sets";
   title2 " ";
   if not in_original then put Date= "has been added";
   else if not in_updated then put Date= "has been removed";
   else do;
      do i=1 to 2;
         if OldN{i} ne NewN{i} then put Date= OldN{i}= NewN{i}=;
      end;
      do i=1 to 1;
         if OldC{i} ne NewC{i} then put Date= OldC{i}= NewC{i}=;
      end;
   end;
run;