Untitled query #77504

SQL

#Preliminary approach: return user edit counts, a field already tracked by wikis. 
#caveats: not accurate, for details refer to Manual:user table, user_editcount
#SELECT DISTINCT user.user_id, user.user_name, user.user_editcount FROM user
#INNER JOIN user_groups ON user.user_id = user_groups.ug_user -- join with user_group table using id to find if user is a bot
#WHERE user_groups.ug_group != 'bot' -- exclude bots from selection
#ORDER BY user_editcount DESC
#LIMIT 10

#Approach 2
#Inner join / Extracting all revisions made by all actors that have made a revision in this wiki
#Tables used: actor, revision, user_groups
SELECT DISTINCT actor.actor_name as Editor, COUNT(revision.rev_actor) AS Num_Edits 
-- Distinct is used because an actor can have multiple user group affiliations
-- COUNT is used to aggreate number of revisions made by a particular actor
FROM actor
INNER JOIN revision ON actor.actor_id = revision.rev_actor
-- optional: filtering bots ---------
#INNER JOIN user_groups ON actor.actor_user = user_groups.ug_user -- join with user_group table using id to find if user is a bot
#WHERE user_groups.ug_group != 'bot' -- exclude bots from selection
-- can comment out above 2 lines if bots are to be included ----------------------------------
GROUP BY Editor -- grouping our aggregate count by editor who performed the revisions
ORDER BY Num_Edits DESC
LIMIT 10 -- getting top 10 from descending ordered data

#Interestingly, the two approaches above result in slightly different rankings
#Some user edit counts are undercounted and some are overcounted in the first approach
#Since it doesn't involve a join, first approach is faster
#both approaches are slow for large wikis/more users
SQL

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