topic Re: merge in SAS Programming

merge

pchen002 — Thu, 28 Sep 2017 09:39:25 GMT

The following SAS program is submitted:

libname temp ‘SAS data library’;
data temp.sales;
merge temp.sales
work.receipt;
by names;
run;
The input data files are sorted by the NAMES variable:

Happen to see this question, so is it okay to have same name for SAS data set that is referenced for both read
and write operations??

Re: merge

FredrikE — Thu, 28 Sep 2017 10:30:17 GMT

Yes!

🙂

Re: merge

Kurt_Bremser — Thu, 28 Sep 2017 11:01:40 GMT

You can do it, which does not mean you should. If you have an error, you need to recreate the dataset from its original source(s).

PS when you create dataset xxx, SAS writes to a file named xxx.sas7bdat.lck. Once the step has finished, that file is renamed to xxx.sas7bdat. If a file with that name already exists, it is deleted first.

If an error (that SAS detects!) happened, and xxx.sas7bdat already exists, no rename is done, the new file is deleted, and the original kept. But that does not protect you from a logical error that is not detected by SAS.