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Ask Ubuntu

Q&A for Ubuntu users and developers

-- At what hour do I ask most posts, both questions and answers?
-- UTC (GMT) time zone. The week starts with Sunday.
-- Parameters:
--   UserId
--   HourOrDOW (1 - hours, 2 - day of week)

-- DEFINE @var = DATEPART("weekday", CreationDate), DATENAME("hour", CreationDate);

WITH grouped AS
  (
  SELECT  *, (CAST(DATEPART("weekday", CreationDate) AS int) + CAST(DATEPART("hour", CreationDate) AS int) / 24) AS cd
  FROM    Posts
  )
SELECT
  cd,
  COUNT(*) AS [Number of posts]
FROM grouped
GROUP BY cd

SELECT
  DATEPART("weekday", CreationDate),
  DATEPART("hour", CreationDate),
  round(DATEPART("hour", CreationDate) / 24, 2)
FROM Posts
WHERE OwnerUserId = ##UserId##

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