Like This?
SELECT DATEADD(day, 0 , DATEDIFF(day, 0, creationdate)), COUNT(*)
FROM tblUsers
GROUP BY DATEADD(day, 0 , DATEDIFF(day, 0, creationdate))
ORDER BY DATEDIFF(day, 0, creationdate)
It generates another error (below)
Server: Msg 144, Level 15, State...