各位大侠，我现在重复处理如下内容：
data a2004;
     set xm.a2004;
run;
data sss;
    set xm.sss;
run;
proc sql;
    create table  a2004s as
   select a2004.*, sss.* from a2004 left join on sss on a2004.b=sss.b;
run;
data a2005;
     set xm.a2005;
run;
data sss;
    set xm.sss;
run;
proc sql;
    create table  a2005s as
   select a2005.*, sss.* from a2004 left join on sss on a2005.b=sss.b;
run;

......
......
data a2099;
     set xm.a2099;
run;
data sss;
    set xm.sss;
run;
proc sql;
    create table  a2099s as
   select a2004.*, sss.* from a2099 left join on sss on a2099.b=sss.b;
run;
这样一遍遍的复制、粘贴、修改，很麻烦，效率也很低。不知道如何通过建一个宏程序来简化该过程。希望各位大侠不吝赐教。谢谢。谢谢。谢谢。