The first part of the name (before the period) is the dataset’s library assignment. Once a library has been assigned to a location with a SAS dataset, the dataset can be referred to in statements using two parts: libref.SAS-dataset-name You will get an error message if you try to refer to a dataset that has not yet been pointed to in a LIBNAME statement. Most SAS users put their LIBNAME statements at the beginning of the program, but you can put a LIBNAME statement anywhere in the program as long as it comes before you reference a file in that location. (This folder must already exist on your computer.) Here is an example LIBNAME statement that creates the library named practice and assigns it to a folder in the directory ‘C:\Users\Research\Thesis.’ LIBNAME practice 'C:\Users\Research\Thesis' Finally, the text in quotes is what path name you tell SAS to assign the library to.
It must be eight or less characters and start with a letter. The second word ( libref) is what you name the library. Here the first word ( LIBNAME) is the SAS keyword that tells it to create a library. The format of the LIBNAME statement is: LIBNAME libref 'Folder path name here' A LIBNAME statement is one of those global statements that we mentioned in Section 1 that does not occur in a data step or a proc step. A library is assigned a location with a LIBNAME statement in SAS. One or many datasets can be assigned to the same library. Alternatively, you can create your own data in SAS, which is also covered below. If it is stored as a file other than SAS (Excel, SPSS, text, etc.) then you’ll need to help SAS read it with one of the methods described in the next sections of this tutorial. If the data you want to work with is already a SAS dataset stored somewhere on your computer, then all you need to do to start working with your data is assign a library name to the location of the dataset. SAS libraries allow users to safely store things like data sets and user-defined formats so that they can be accessed without having to reload or re-read them from an external file every time SAS is started. A SAS library is a folder located on a user's disk drive or on the internet that is specially designated for use by SAS.
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