Q&A for professional and enthusiast programmers
select datefromparts(year(p.CreationDate), month(p.CreationDate), day(p.CreationDate)), count(p.Id)--, count(d.Id) from Posts p where ClosedDate is null group by year(p.CreationDate), month(p.CreationDate), day(p.CreationDate) order by year(p.CreationDate), month(p.CreationDate), day(p.CreationDate)