Loop thru values in a data set

[Kody_devl]

I am an experienced developer in everything but SAS.

I have a Dataset --->   "Periods" with a single column and 12 periods:

YYYYPP

201605

201604

201603

201602

....

...

I want step thru each data format in the Periods table, run an query to pull based on each of the 12 dates, by setting the current period equal to a variable and using the variable as criteria for the pull. 

I can do all parts of this except the looping part of the code. 

This is my approach and I can't get it to work.

%Macro macro1;

%Do i = 1 %To 12 %By 1;

call symputx ('YYYYPP',trim(YYYYPP));

RunQuery using &YYYYPP.

%end

%Mend macro1; %macro1;

Any Help is appreciated in advance.

Thank you.

[LinusH]

Typically, this is done via a call execute() in a data _null_ step.

But what kind of pull do you need to do?

Perhaps it could be solved in a simple SQL join?