可能得用程序来做了

请教细节？

data a;
   input year p0 id;
cards;
2004 1 2
2004 2 2
2004 3 2
2004 4 2
2004 5 2
;
run;

data b;
   input year p1 id;
cards;
2004 10 2
2004 20 2
;
run;

proc sql;
   create table c as
   select * from b left join a
   on b.year=a.year and b.id=a.id
   order by year, id, p1, p0;
quit;

题目意思表达不清