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Q&A about the site for programming puzzle enthusiasts and code golfers

-- The best time to ask questions
-- Look for the minimum value on y-scale:
-- It says when the time between question and answer is minimal.
-- For example

select TOP 500 Title, AcceptedAnswerId FROM Posts
/*
SELECT TOP 5 DATEDIFF(minute, q.CreationDate, a.CreationDate) as diffMin,
         ROUND((CAST(DATEPART("weekday", q.CreationDate) AS float) +
                CAST(DATEPART("hour", q.CreationDate) AS float) / 24), 2) as cat
  FROM Posts q
    LEFT OUTER JOIN Posts a ON q.AcceptedAnswerId = a.Id
  WHERE q.AcceptedAnswerId > 0


WITH tmp AS
(
  SELECT DATEDIFF(minute, q.CreationDate, a.CreationDate) as diffMin,
         ROUND((CAST(DATEPART("weekday", q.CreationDate) AS float) +
                CAST(DATEPART("hour", q.CreationDate) AS float) / 24), 2) as cat
  FROM Posts q
    LEFT OUTER JOIN Posts a ON q.AcceptedAnswerId = a.Id
  WHERE q.AcceptedAnswerId > 0
  )
  SELECT cat, AVG(diffMin)
FROM tmp
GROUP BY cat
ORDER BY cat

*/

view current version

edited dec 21 13

created dec 21 13 Anton.