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Shows the trend for your favourite tag

Q&A about the site for students and teachers of all martial arts

DECLARE @TagName varchar(255) = '##TagName##';

DECLARE @PostCountByMonth TABLE
(
  [date] datetime,
  [count] int,
  UNIQUE CLUSTERED ([date])
);

INSERT INTO @PostCountByMonth
SELECT dateadd(month, DATEDIFF(month, '', p.CreationDate), '') [date], count(*) [count]
FROM Posts p
WHERE p.Tags LIKE '%<##TagName##>%'
GROUP BY DATEDIFF(month, '', p.CreationDate)
ORDER BY DATEDIFF(month, '', p.CreationDate);

SELECT p1.[date], avg(p1.[count]) [count], sum(p2.[count]) [trend]
FROM @PostCountByMonth p1 INNER JOIN @PostCountByMonth p2
  ON p1.[date] >= p2.[date]
GROUP BY p1.[date]

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edited may 25 12

created dec 13 10 prof3ta