Hello,   I wanted to ask if there is an error in one question in course called: SAS Programming 1: Essentials. In this question (attached) the correct answer are a,b and c. In my opinion it is not correct as in SET statement specifically you can use only a SAS table as a source/input. To use excel, dmbs or other sources, they need to be converted first into SAS table by PROC IMPORT or LIBNAME engine. Is this correct? If not, can I ask for explanation? Thanks in advance.   Best Regards, MG ... View more