data a;
input n1;
cards;
1
0
3
4
;
run;

proc sql;
select
*,
sum(n1) as total
from a;
run;

直接用sum statement 也行

data a;
input n1;
total+n1; * sum statement;
cards;
1
0
3
4
;
run;
* 最后一行的total 才是目标值，不知道有没有影响
proc print data=a;
run;

data a;
        input n1 @@;
        cards;
        1 1 2 3 4 5 6 7 8
        ;
run;

proc sql;
        create table b as select sum(n1) as total from a;
quit;

data c;
        set a ;
        retain total;
        total+n1;
run;