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jcis7
Pyrite | Level 9

Hello!

 

I have two sas tables and am trying figure out which observations between the two tables are different.

I don't know if table a has observations table b doesn't have and vice versa.

 

How would I do that?  They differ by the identifying variable schcode

 

proc sql;

create table differing as

select a.*

from a

left join b on a.schcode=b.schcode;

quit;

 

Thanks!

1 ACCEPTED SOLUTION

Accepted Solutions
nehalsanghvi
Pyrite | Level 9

Are you simply trying to see which observations are in one and and not in the other? If so, then this would work:

 

proc sql;
create table differing as
select *, 'In A, not in B' as Note
from a
where schcode not in (select schcode from b)
union
select *, 'In B, not in A' as Note
from b
where schcode not in (select schcode from a);
quit;

 

If you're trying to column compare values as well, then proc compare is the way to go.

View solution in original post

3 REPLIES 3
jhlaramore
SAS Employee

Take a look at PROC COMPARE. It's an excellent option for comparing observations between two SAS data sets. 

 

http://support.sas.com/documentation/cdl/en/proc/69850/HTML/default/viewer.htm#n1nwxbchh5hpu1n1h28km...

 

 

nehalsanghvi
Pyrite | Level 9

Are you simply trying to see which observations are in one and and not in the other? If so, then this would work:

 

proc sql;
create table differing as
select *, 'In A, not in B' as Note
from a
where schcode not in (select schcode from b)
union
select *, 'In B, not in A' as Note
from b
where schcode not in (select schcode from a);
quit;

 

If you're trying to column compare values as well, then proc compare is the way to go.

jcis7
Pyrite | Level 9

Thank you everyone :)!

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