如何这样合并数据集

use proc sql, no need to sort, but you may use order by clause

proc sql;
creat table ab as
select COALESCE(a.id,b.id) as id,  money, house, sex, race, age
from a right join b on a.id=b.id;

data ab;

merge a b;

by ID;

run;  

正解！放心用吧！千万的用！