Q&A for linguists, teachers and learners wanting to discuss the finer points of the Portuguese language
/* 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.
- 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
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
GROUP BY Period
ORDER BY Period