Einwegsocken identifizieren

This query is marked as a draft This query has been published by Wurgl.

Siehe https://de.wikipedia.org/wiki/Benutzer_Diskussion:Wurgl#Single_Purpose_Accounts

SQL

SET @MAX_ARTICLES = 3;
SELECT user_name
  FROM user, actor
 WHERE actor_user = user_id
   AND (SELECT COUNT(*)
          FROM revision, page
         WHERE rev_actor = actor_id
           AND rev_parent_id = 0
           AND rev_page = page_id
           AND page_namespace = 0
           AND NOT EXISTS (SELECT 1
                             FROM page_props
                            WHERE pp_page = page_id
                              AND pp_prop_name = 'disambiguation'
                          )
       ) < @MAX_ARTICLES
 LIMIT 5;

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