proc freq data=yourdata nlevels;
Tables Id/ out=tmp_data_freq;
Run;

Data data_freq;
Set tmp_data_freq;
Where counts >1;
Run;

Proc sort data=data_freq;
By id;
Run;

Proc sort data=yourdata;
By id;
Run;

Data final;
Merge data_freq(in=a keep=Id) yourdata(in=b);
By id;
If a;
Run;

如果用sql,第三四五段用以下代码替代
Proc sql;
Create table final as
Select *
From yourdata
Where id in(select id from data_freq);
Quit;


这样就能将多条记录的人导出来

第二种方法正是我想学习的，非常感谢！

其实就是子查询

proc sql;
select * from A group by id having count(*)>1;
quit;

proc sql;
select * from
(select * from A group by id having count(*)>1)
where index=1;
quit;