In order to create a DATA step view, specify the VIEW= option after the final data set name in the DATA statement. The VIEW= option tells SAS to compile, but not to execute, the source program and to store the compiled code in the input DATA step view that is named in the option.

For example, the following statements create a DATA step view named DEPT.A:

libname dept 'SAS-library';

data dept.a / view=dept.a;
   ... more SAS statements ...
run;

Note that if the SAS view exists in a SAS library, and if you use the same member name to create a new view definition, then the old SAS view is overwritten.

Beginning with Version 8, DATA step views retain source statements. You can retrieve these statements using the DESCRIBE statement. The following example uses the DESCRIBE statement in a DATA step view in order to write a copy of the source code to the SAS log:


Using a DATA step view, you can do the following:

    directly process any file that can be read with an INPUT statement

    read other SAS data sets

    generate data without using any external data sources and without creating an intermediate SAS data file.

Because DATA step views are generated by the DATA step, they can manipulate and manage input data from a variety of sources including data from external files and data from existing SAS data sets. The scope of what you can do with a DATA step view, therefore, is much broader than that of other types of SAS views.
For More Info： http://support.sas.com/documentation/cdl/en/lrcon/62955/HTML/default/viewer.htm#a001278887.htm

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