PROC MEANS

呵呵，谢谢你们啊，，学到不少！！

proc sql;
        create table aa as
        select    sum(case when v1=1 then 1 else 0 end)/count(*) as v1_1_per
                     ,sum(case when v2=1 then 1 else 0 end)/count(*) as v2_1_per
        from a;
quit;