求大神回答啊~

Method 1:
proc means data=data1;
class sic;
var sales;
output out=data2 mean=x_mean;
run;

Method 2:
proc summary data=data1;
class sic;
var sales;
output out=data2 mean=x_mean;
run;
In addition, you can also use "by" option for the mean of group

也可以使用proc sql，打开SQL灵活的运数方式

谢谢！

proc sql;
create table mydb.CalMul_SALES as
select EndDate,SIC,sum(SALES) as SALES_sum
from mydb.OFDI_FIN
group by EndDate SIC;
quit;