Number of comments per month by user (excludes deleted comments)
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
select year(p.CreationDate) as [Year], month(p.CreationDate) as [Month], count(*) as [Questions] from Posts p where PostTypeId = 1 group by year(p.CreationDate), month(p.CreationDate) order by year(p.CreationDate) desc, month(p.CreationDate) desc