/************************************************************
 * concatenate all strings in a column into a macro variable
 *
 * Peng Zeng (Auburn University)
 * 10-17-2018
 ************************************************************/


data example;
   length names $20;
   input names $;
datalines;
AUDI
FORD
CHEVROLET
;

proc print data = example; run;

proc sql;
   select names into: list_names separated by "/" 
   from example;
quit;

%put &list_names;