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Permanent libraries contain permanent data sets.
The SASHelp, SASUser and Webwork libraries are all built-in permanent libraries:
Permanent Data Sets
Now, expand the SASHelp library.
SASHelp library contains many built-in permanent data sets.
Referencing Permanent Data Sets
When referencing a permanent data set, the library reference (libref) must be used.
Data vehicle; Set SASHelp.cars; Run;
In this example, the data is read from the permanent SASHelp library and written into the temporary VEHICLE data set.
The libref (SASHelp) is used when referencing the CARS data set in the SASHelp library.
In the next section, you will learn how to create your own permanent data set.
✍️ Exam Tips
Without the library reference, the data set is stored in the Work library.
💯 Sample Exam Question(s):
The answer is (a).
The output data set (i.e. REPORT) does not have a library reference. It is stored in the WORK library.