When to post to get more views

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/* GETTING MORE VIEWS

On the graph, look for the value on the x-axis that
corresponds to the maximum value on y-axis.
That's when questions get most views.

As for Dec 2013, questions get more views when posted
at 5am GMT.

Axes:
- X: Hours, days of week, or both
    1.0 is Sunday, 12am GMT; 3.5 means Tuesday, 12pm GMT.
- Y: Views per question created at time X.

Parameters:
- All: Include all users or only one specified by UserId
    Values: 0 - show stats for one user, 1 - for all users
- Frequency: The scale of X-axis
    Values: 1 - hours, 2 - day of week, 3 - both
- UserId: Whose stats to include in calculations. Matters only when All = 0.
    Values: Your user ID or someone else's.
- YearsBack: How many previous years take into account. There're interesting
    changes in results as the number of years changes.
*/


DECLARE @All int = ##All:int?1##
DECLARE @Frequency int = ##Frequency:int?3##
DECLARE @UsedId int = ##UserId:int##
DECLARE @YearsBack int = ##YearsBack:int?1##

;WITH tmp AS
(
  SELECT q.ViewCount,
         Period = CASE @Frequency
           WHEN 1 THEN DATEPART("hour", q.CreationDate)
           WHEN 2 THEN DATEPART("weekday", q.CreationDate)
           WHEN 3 THEN ROUND((CAST(DATEPART("weekday", q.CreationDate) AS numeric) +
             CAST(DATEPART("hour", q.CreationDate) AS numeric) / 24), 2) END
  FROM Posts q
  WHERE q.OwnerUserId = CASE WHEN @All = 1 THEN q.OwnerUserId ELSE @UsedId END
    AND q.CreationDate > DATEADD("year", -@YearsBack, CURRENT_TIMESTAMP)
    AND q.PostTypeId = 1
  )
  SELECT Period, CAST(SUM(ViewCount) AS FLOAT)/CAST(COUNT(*) AS FLOAT) AS [Views per question]
FROM tmp
GROUP BY Period
ORDER BY Period

Enter Parameters

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