%macro xunhuan(ds=a,par=,delim=);
%let i=1;
%do %while(%scan(%quote(&par),&i,%quote(&delim)) ne );
proc sort data=&ds ;
by %scan(%quote(&par),&i,%quote(&delim));
run;
%let i=%eval(&i+1);
%end;
%mend;
%xunhuan(par=%str(year , qua , month , week , year qua ,id year, id year marks),delim=%str(,))


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