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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?

SELECT
  TOP 100
  p.OwnerUserId,
  pt.*,
  v.*

FROM Votes v
JOIN Posts p ON v.PostId = p.Id
LEFT JOIN PostTypes pt ON pt.Id = p.PostTypeId

WHERE pt.Name = '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.
/*
SELECT 

  pt.Id post_type_id, 
  pt.Name post_type_name,
  AVG(CAST(p.FavoriteCount as float)) avg_fvt,
  -- Sanity checks below here
  COUNT(*) my_count, 
  SUM(CASE WHEN p.FavoriteCount >= 0 THEN 1 ELSE 0 END) count_of_nums,
  SUM(p.FavoriteCount) sum_fvt,
  
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;

fork query

edited may 18 22

created may 17 22 anonymous