SAS 问题：如图，小sample A 和大sample B, 里面有着不完全相同的值。如何使得两个数据保留相同内容的值。

SAS 问题：如图，小sample A 和大sample B, 里面有着不完全相同的值。如何使得两个数据保留相同内容的值。

merge语句可以啊，程序如下：
data sampleA;
input sa $;
cards;
A09
A10
A15
A18
;
run;

data sampleB;
input sa $;
cards;
A07
A10
A12
A16
A18
;
run;

data a;
merge sampleA(in=a) sampleB(in=b);
by sa;
if a=b;
run;

data sampleA;
input sa $;
cards;
A09
A10
A15
A18
;
run;
data sampleB;
input sb $;
cards;
A07
A10
A12
A16
A18
;
run;
proc sql;
select a.sa ,b.sb
from sampleA as a ,sampleB as b
where a.sa=b.sb;
quit;

下面这段code应该能解决你的问题，两个数据集你可能还要自己创建下
data sampleA;
input sa $;
cards;
A09
A10
A15
A18
;
run;
data sampleB;
input sb $;
cards;
A07
A10
A12
A16
A18
;
run;
proc sql;
create table final as
select a.sa, b.sb
from sampleA as a
inner join sampleB as b
on a.sa=b.sb;
quit;

提个思路吧 不在电脑边
data Newa newb;
Set samplea(in a) sampleb(in b);
If a=b output Newa newb;
Run;