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SELECT YEAR(c.CreationDate)*100 + MONTH(c.CreationDate)*100/12 As YearMonth, Count(c.Id) As CountOfComments FROM Comments c INNER JOIN Users u ON c.UserId = u.Id WHERE u.Reputation > ##HighRepBorder:int## GROUP BY YEAR(c.CreationDate)*100 + MONTH(c.CreationDate)*100/12 ORDER BY YEAR(c.CreationDate)*100 + MONTH(c.CreationDate)*100/12