BookmarkSubscribeRSS Feed
deleted_user
Not applicable
Two tables:

A with variables ID, X, Y.
B with variables ID, Z

Merging:

data C;
merge A B;
by ID;
run;

If anyone of A and B is not sorted by ID, shouldn't there be a message in the log about it?
4 REPLIES 4
Flip
Fluorite | Level 6
Only if they are not in the correct order. The message is generated when data lines are encountered in the wrong order, not due to a sort indicator.
deleted_user
Not applicable
Thanks for your answer.

In my example above table A was sorted by ID with PROC SORT, but table B was not.

So, since there was no message concerning table B, I can draw the conclusion, for sure, that the records in B was in correct order?

You NEVER have to worry when there is a BY in the merging, that you get something that you don't want?
sbb
Lapis Lazuli | Level 10 sbb
Lapis Lazuli | Level 10
As long as you do not code the BY statement parameter NOSORTED. Useful reading below, for your consideration.

Scott Barry
SBBWorks, Inc.

SAS Language Reference: Concepts, Processing BY-Groups in the DATA Step
http://support.sas.com/documentation/cdl/en/lrcon/61722/HTML/default/a000761932.htm
data_null__
Jade | Level 19
MERGE does not support BY statement with NOTSORTED option.

hackathon24-white-horiz.png

2025 SAS Hackathon: There is still time!

Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!

Register Now

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

SAS Training: Just a Click Away

 Ready to level-up your skills? Choose your own adventure.

Browse our catalog!

Discussion stats
  • 4 replies
  • 1474 views
  • 0 likes
  • 4 in conversation