Answer score quartiles as a function of length

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Plots quartiles of the answer score distribution as a function of answer length.

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WITH 
AllQuartiles(RoundedLength,PostScore,Quartile)
AS (
  SELECT TOP(##postsNo?100000##) 
  (ROUND(LEN(Body), -##logRound?3##) +0.5E##logRound?3##)
    AS RoundedLength,
  Score 
    AS PostScore,
  NTILE(4) OVER(PARTITION BY ROUND(LEN(Body), -##logRound?3##) ORDER BY Score) 
    AS Quartile
  FROM Posts
  WHERE 
    PostTypeId = 2 AND
    LEN(Body) <= ##maxLength?20000##
  ORDER BY
    ROUND(LEN(Body), -##logRound?3##),Score
)
SELECT 
  RoundedLength,
  MAX(CASE Quartile WHEN 1 THEN PostScore END) '1',
  MAX(CASE Quartile WHEN 2 THEN PostScore END) '2',
  MAX(CASE Quartile WHEN 3 THEN PostScore END) '3'
FROM 
  AllQuartiles
--WHERE
  --Quartile!=4
GROUP BY
  RoundedLength
ORDER BY
  RoundedLength

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