What do you mean by 'read the data set'? And what if the variable has the value AA?
If I am understanding you properly:
Use PROC CONTENTS to determine which variable names are in the data set. Then you can determine which path to follow and which data set to read.
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Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
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