(test) rowiki users by no. of articles created

SQL

SELECT COUNT(1) AS pages_with_disambig_but_not_redir FROM page
WHERE (page_namespace = 0 AND page_is_redirect = 0);
SELECT
	user_id AS user_id_final,
	CASE WHEN user_id = -2 THEN CONCAT("<", COUNT(1), " registered users under the threshold>") ELSE user_name END AS user_name_final,
	user_articles AS user_articles_final,
	user_latestcreaton AS user_latestcreation_final
FROM (
	SELECT
		CASE WHEN user_articles_ >= 10 THEN user_id_ ELSE -2 END AS user_id,
		user_name_ AS user_name,
		user_articles_ END AS user_articles,
		CASE WHEN user_articles_ >= 10 THEN user_latestcreation_ ELSE 0 END AS user_latestcreation
	FROM (
		SELECT
			CASE WHEN user_id__ IS NULL THEN -1 ELSE user_id__ END AS user_id_,
			CASE
				WHEN user_id__ IS NULL THEN CONCAT("<", COUNT(DISTINCT actor_id__), " unregistered users>")
				ELSE user_name__
			END AS user_name_,
			COUNT(user_articles__) AS user_articles_,
			CASE WHEN user_id__ IS NULL THEN 0 ELSE MAX(rev_timestamp_) END AS user_latestcreation_
		FROM (
			SELECT
				actor_id AS actor_id__,
				actor_user AS user_id__,
				actor_name AS user_name__,
				1 AS user_articles__,
				rev_timestamp_
			FROM (
				SELECT rev_actor, rev_timestamp_ FROM (
					-- SELECT rev_actor, MIN(rev_timestamp) AS rev_timestamp_ FROM revision
					SELECT rev_actor, rev_timestamp AS rev_timestamp_, rev_page FROM revision
					GROUP BY rev_page
				) AS revtable
				LEFT JOIN page ON revtable.rev_page = page.page_id
				WHERE (page_namespace = 0 AND page_is_redirect = 0)
			) AS uti
			LEFT JOIN actor ON uti.rev_actor = actor.actor_id
		) AS uti_
		GROUP BY user_id__
	) AS uti__
) AS uti___
GROUP BY user_id_
ORDER BY user_articles DESC;
SQL

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