没必要用宏, e.g.
data two;
        set one;
        rename var1-var10=var2-var11;
run;

额，不错！

The drawback of this approach is the data set needs re-build. It is fine for a small data set. For a large data set the correct way is using,

proc datasets,
   modeify dsn;
  rename ....;
quit;