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SELECT CreationDate
     , Score
     , avg(CAST(Score AS FLOAT)) OVER (
         ORDER BY CreationDate
         ROWS ##IncludePreceding:INT?9## PRECEDING
       ) AS RollingAvg
    FROM Posts
    WHERE PostTypeId = 2 AND OwnerUserId = ##UserId:INT##;

fork query

edited sep 9 14

created sep 4 14 rolfl