PROC MEANS PROCEDURE OPTIONS

[CeliaAlonso]

Good morning, 

I would like to know

-how PROC MEANS procedure works 

-the different options that has PROC MEANS procedure

-the difference between class and by options 

Thanks! 

[RW9]

This is what the documentation:

http://documentation.sas.com/?docsetId=proc&docsetTarget=n1qnc9bddfvhzqn105kqitnf29cp.htm&docsetVers...

Is for, and provides examples of each situation.  There is also SAS provided videos, which may also help:
https://video.sas.com/