Hi there,

Let's consider a code like this:

DATA temp (drop=month);

SET sashelp.class;

...

DO month=1 to 10;

...

END;

...

RUN ;

Since there is a data set inside, we have multiple iterations of the data step. I was wondering, how did the data set option drop= do in this code?

My guess is like this:

at the end of EACH data step iteration, the value of the variable month in the PDV would not be written to the data set temp.

Is this understanding right? Thanks a lot.

Max