例: DATAステップでのBYグループの処理

data zip;
input zipCode State $ City $ Street $20-29;
datalines;
85730 AZ Tucson    Domenic Ln
85730 AZ Tucson    Gleeson Pl
33133 FL Miami     Rice St	
33133 FL Miami     Thomas Ave
33133 FL Miami     Surrey Dr
33133 FL Miami     Trade Ave
33146 FL Miami     Nervia St
33146 FL Miami     Corsica St
33801 FL Lakeland  French Ave
33809 FL Lakeland  Egret Dr
; 

proc sort data=zip; 
   by zipCode; 
run;

data zip; 
   set zip;
   by zipCode;
run;

proc print data=zip noobs; 
   title 'BY-Group Uing a Single Variable: ZipCode'; 
run;

data zip;
input State $ City $ Street $13-22 ZipCode ;
datalines;
FL Miami    Nervia St  33146
FL Miami    Rice St    33133
FL Miami    Corsica St 33146
FL Miami    Thomas Ave 33133
FL Miami    Surrey Dr  33133
FL Miami    Trade Ave  33133
FL Lakeland French Ave 33801
FL Lakeland Egret Dr   33809
AZ Tucson   Domenic Ln 85730
AZ Tucson   Gleeson Pl 85730
;


proc sort data=zip; 
   by State City; 
run;

data zip; 
   set zip; 
   by State City;
run;
proc print data=zip noobs; 
   title 'BY Groups with Multiple BY Variables: State City'; 
run;

options
linesize=80 pagesize=60;     

data test;
   input name $ Score;
datalines;
Jon     1
Anthony 3
Miguel  3
Joseph  4
Ian     5
Jan     6
;
proc format;
   value Range 1-2='Low'
               3-4='Medium' 
               5-6='High';
run;     

data newtest; 
   set test;   
   by groupformat Score; 
   format Score Range.;    
run;  

proc print data=newtest;    
   title 'Score Categories';    
   var Name Score;    
   by Score;    
run;