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This will figure out some statistics as to what tags bring users to a site, and how long they stick around.

Q&A about the site for committed Christians, experts in Christianity and those interested in learning more

WITH FirstPosts AS (
    SELECT OwnerUserId as SEUser,
           Min(Id) as Post
           
    FROM Posts
    GROUP BY OwnerUserId
),
UserQuestionCount AS (
  SELECT count(Id) AS PostCount, OwnerUserId AS Id
  FROM Posts
  GROUP BY OwnerUserId
 )

SELECT TOP 200 t.tagname, 
  count(Tags) AS Users, 
  PostsPerUser=1.0*Sum(UserQuestionCount.PostCount)/count(Tags)
FROM FirstPosts INNER JOIN Users on FirstPosts.SEUser = Users.Id
                INNER JOIN Posts on FirstPosts.Post = Posts.Id
  INNER JOIN PostTags pt on Posts.Id = pt.PostId
  INNER JOIN Tags t on pt.TagId = t.Id
  INNER JOIN UserQuestionCount ON Users.Id = UserQuestionCount.Id
  GROUP BY t.tagname HAVING count(Tags)>10
ORDER BY PostsPerUser DESC

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edited mar 5 13 pearsonartphoto

created mar 5 13 anonymous