BookmarkSubscribeRSS Feed
co_ba
Calcite | Level 5

What is the best approach to update a data set that only adds the new data, change in case of revisions but does not create a duplicate variables?

data merge, proc sql?

Thanks for your advice

co-ba

2 REPLIES 2
Tom
Super User Tom
Super User

If you want to replace existing rows then use MERGE. Make sure to have the new dataset listed last.

data want ;

   merge old new ;

   by id ;

run;

You could also look at the UPDATE statement, but that is really intended for transactions, not new records.  Read about what happens when the transaction dataset has missing values for a variable.

For more complicated situations look at the MODIFY statement.

Ksharp
Super User

What is your sample data?

What data do you want to add ? and Final dataset is what looks like?

Ksharp

sas-innovate-2024.png

Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only.

Pre-conference courses and tutorials are filling up fast and are always a sellout. Register today to reserve your seat.

 

Register now!

What is Bayesian Analysis?

Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.

Find more tutorials on the SAS Users YouTube channel.

Click image to register for webinarClick image to register for webinar

Classroom Training Available!

Select SAS Training centers are offering in-person courses. View upcoming courses for:

View all other training opportunities.

Discussion stats
  • 2 replies
  • 896 views
  • 0 likes
  • 3 in conversation