proc compare, ony output unequal obs

[Jaheuk]

when I use proc compare to compare 2 data sets AND everything is 100% the same,

I still get output because I use the ID statement 

how can I avoid this??

[JosvanderVelden]

Does the answer from @Reeza help?
See thread: https://communities.sas.com/t5/General-SAS-Programming/Output-of-Proc-Compare-get-only-differences/t...

Best regards, Jos

[ballardw]

---

@Jaheuk wrote:

when I use proc compare to compare 2 data sets AND everything is 100% the same,

I still get output because I use the ID statement 

how can I avoid this??

---

What does your log show?

ID does not "cause" this. Example:

proc sort data=sashelp.class
   out=work.class1;
   by name;
run;

proc sort data=sashelp.class
   out=work.class2;
   by name;
run;

proc compare data=work.class1
      compare=work.class2
      outnoequal out=work.compare 
      method=absolute criterion=0.5;
   id name;
run;

Which in my log:

NOTE: There were 19 observations read from the data set WORK.CLASS1.
NOTE: There were 19 observations read from the data set WORK.CLASS2.
NOTE: The data set WORK.COMPARE has 0 observations and 7 variables.
NOTE: PROCEDURE COMPARE used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds

So an ID statement does not cause any issue.

So one questions the claim of "100% the same".

You might try removing the NOPRINT option and seeing what specific values are being reported as unequal.

For example if I modify the weight value for Alice in the above example I get a table like:

Value Comparison Results for Variables
__________________________________________________________
           ||       Base    Compare
 Name      ||     Weight     Weight      Diff.     % Diff
 ________  ||  _________  _________  _________  _________
           ||
 Alice     ||    99.0000    84.0000   -15.0000   -15.1515
__________________________________________________________

Which shows which specific value for the ID variables has a difference.