SELECT TOP 1000
u.DisplayName AS [User Link],
COUNT(p.Id) AS [Post Count],
u.Reputation AS [User Reputation],
u.Reputation * 1000 / SUM(LEN(p.Body)) AS [User RPC1k]
FROM
Users U
JOIN
Posts p ON p.OwnerUserId = u.Id
GROUP BY
u.DisplayName, u.Reputation
ORDER BY
[User RPC1k] DESC