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-- At what hour do I ask most posts, both questions and answers?
-- UTC (GMT) time zone.

DECLARE @UserId int = ##UserId##;
DECLARE @Part varchar(10)

-- SELECT @Part = CASE ##HourOrDOW:int##
-- WHEN 1 THEN DATEPART("hour", CreationDate)
-- WHEN 2 THEN DATEPART("weekday", CreationDate)
-- ELSE DATEPART("hour", CreationDate)
-- END

-- ##HourOrDOW:string##

-- CASE ##HourOrDOW## WHEN 1 THEN "hour" WHEN 2 THEN "weekday" ELSE "hour" END
IF ##HourOrDOW:int## = 1
  SELECT
    DATEPART("hour", CreationDate) AS [Hour you add a post],
    COUNT(*) AS [Number of your posts]
  FROM Posts
  WHERE OwnerUserId = @UserId
  GROUP BY DATEPART("hour", CreationDate)
ELSE
SELECT
    DATEPART("weekday", CreationDate) AS [Weekday you add a post],
    COUNT(*) AS [Number of your posts]
  FROM Posts
  WHERE OwnerUserId = @UserId
  GROUP BY DATEPART("weekday", CreationDate)

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edited dec 21 13

created dec 21 13 Anton.