End Google Ads 201810 - BS.net 01 --> Hi

I want to bind my combobox with data like

January 2011
Februry 2011
..
..
..
December 2011

Also If current month is january it also show
November 2010
December 2010

else if Current month is Februry it should also show
December 2010
Is there any sql query so that I can get this result.
Please Help
Thanks in advance