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Q&A for ebook publishers and readers

SELECT 
    Users.location as Location,
    Tags.TagName as TransportType,
    COUNT(DISTINCT Posts.Id) as QuestionCount,
    AVG(CAST(Posts.Score as FLOAT)) as AvgScore,
    SUM(Posts.ViewCount) as TotalViews
FROM Posts
LEFT JOIN PostTags ON Posts.Id = PostTags.PostId
LEFT JOIN Tags ON PostTags.TagId = Tags.Id
LEFT JOIN Users ON Posts.OwnerUserId = Users.Id
WHERE Tags.TagName IN ('air-travel', 'trains', 'car-rentals', 'public-transport', 'cruise')
    AND Posts.PostTypeId = 1
GROUP BY Users.Location, Tags.TagName
ORDER BY QuestionCount DESC;

fork query

edited dec 6

created dec 6 anonymous