Bringing back distinct column from a dataset

[zdassu]

Hi I am trying to group on a table and I am trying to bring back just 1 column, I can do using SQL but I was wandering if someone knows how to do it in data step. The table has many columns but I only want to bring back 1.

Proc sql;  
select distinct t1.month_received
from have t1;
run;

I tried using Proc Sort but I was not sure how to bring back just the one column, is there anyway I can bring back just the 1 column or do I have to create another data step

proc sort data=have nodupkey out=have1;
by month_received;
run;

[kiranv_ · Accepted solution]

Try 

proc sort data=have(keep=month_received) nodupkey out=have1;
by month_received;
run

[zdassu]

Thanks for your help kiranv_