Q&A for spacecraft operators, scientists, engineers, and enthusiasts
-- Question 4
-- Using the Votes, VoteTypes, Posts, and PostTypes tables,
-- display the users who have the highest upvote to post ratio
-- of all time for posts of type Question. i.e. Which users on
-- the platform ask the most insightful questions as judged by their
-- peers with accounts?
FROM Votes v
JOIN Posts p ON v.PostId = p.Id
LEFT JOIN PostTypes pt ON pt.Id = p.PostTypeId
WHERE p.PostTypeId = 1 --1=Question
-- Question 3
-- Using the Posts and PostType tables, find the average number of
-- Favorites per post for each post type. Once again,
-- please note something interesting this query tells you about the
-- database below your code.
AVG(CAST(p.FavoriteCount as float)) avg_fvt,
-- Sanity checks below here
SUM(CASE WHEN p.FavoriteCount >= 0 THEN 1 ELSE 0 END) count_of_nums,
FROM Posts p LEFT JOIN PostTypes pt ON p.PostTypeId = pt.Id
GROUP BY pt.Id, pt.Name ORDER BY 1 DESC
-- COMMENT: only post type=1 have favorite scores at all. The Avg value does not include nulls.
-- Question 2
-- Using the Users table, please query the 25 most frequent
-- “Reputation” values users have on the site.
--Please comment below your code something interesting this
-- result tells you about the “Reputation” field.
--SELECT TOP 25 COUNT(*), Reputation FROM Users GROUP BY Reputation ORDER BY 1 DESC;
-- COMMENT: The most commonly occuring reputation scores have 1s and 0s only?
-- Question 1
--SELECT COUNT(DISTINCT(OwnerUserId)) FROM Posts;
--SELECT COUNT(DISTINCT(OwnerUserId)) FROM Posts WHERE OwnerUserId >=0;