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Q&A for students, teachers, polyglots, and anyone interested in the techniques of second-language acquisition

-- 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);

SELECT
    
    [Time] = DATEPART("weekday", CreationDate) + DATENAME("hour", CreationDate) / 24,
    COUNT(*) AS [Number of posts]
  FROM Posts
  GROUP BY DATENAME("hour", CreationDate), DATEPART("weekday", CreationDate)
  ORDER BY DATENAME("hour", CreationDate), DATEPART("weekday", CreationDate)

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edited dec 21 13

created dec 21 13 Anton.