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Q&A for Salesforce administrators, implementation experts, developers and anybody in-between

/* BEST TIME TO ASK QUESTIONS

The best time here is when the delay between a question and an accepted
answer is shortest.

On the graph, look for the value on the x-axis that
corresponds to the minimum value on y-axis.
That's the best time as defined above.

As for Dec 2013, the smallest time-to-answer was for questions asked
on Saturday at 1pm GMT. The asker had to wait for only 78 minutes.

Parameters:
- All: Include all users of 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
- MaxTimeDiff: The cut off value for time difference. All time-to-answer
    above this value will be excluded from the statistics.
    Default value: 1440 min (24 hours).
- UserId: Whose stats to include in calculations. Matters only when All = 0.
    Values: Your user ID or someone else's.
*/


DECLARE @Frequency int = ##Frequency:int?3##
DECLARE @MaxTimeDiff int = ##MaxTimeDiff:int?1440##
DECLARE @All int = ##All:int?1##
DECLARE @UsedId int = ##UserId:int##

;WITH tmp AS
(
  SELECT x1 = q.ViewCount, x2 = q.Score,
         x3 = DATEDIFF(minute, q.CreationDate, a.CreationDate),
         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
    LEFT OUTER JOIN Posts a ON q.AcceptedAnswerId = a.Id
  WHERE q.AcceptedAnswerId > 0
    AND q.OwnerUserId = CASE WHEN @All = 1 THEN q.OwnerUserId ELSE @UsedId END
  )
  SELECT Period,
    AVG(x1) as m_views,
    ROUND(STDEV(CAST(x1 AS FLOAT)), 2) as sd_views,
    AVG(x2) as m_score,
    ROUND(STDEV(CAST(x2 AS FLOAT)), 2) as sd_scores,
    AVG(x3) as m_td,
    ROUND(STDEV(CAST(x3 AS FLOAT)), 2) as sd_td
FROM tmp
GROUP BY Period
ORDER BY Period

view current version

edited dec 21 13

created dec 21 13 Anton.