Q&A for those using, extending or developing Emacs
select CONCAT(MONTH(CreationDate), '-', YEAR(CreationDate)), count(*) from posts p join posttypes pt on p.posttypeid=pt.id join posttags ptag on p.id = ptag.postid join Tags t on t.Id = ptag.tagid where t.TagName='angularjs' group by MONTH(CreationDate), YEAR(CreationDate) order by YEAR(CreationDate), MONTH(CreationDate)