Find duplicate Geograph IDs on Commons

This query is marked as a draft This query has been published by Bjh21.

This query provided the data for https://commons.wikimedia.org/wiki/User:Geograph_Update_Bot/duplicate_Geograph_IDs.  The bot now queries the database directly.

SQL

  SELECT cl_sortkey_prefix, GROUP_CONCAT(cl_from) AS page_ids
    FROM categorylinks
   WHERE cl_to = 'Images_from_Geograph_Britain_and_Ireland'
     AND cl_type = 'file'
     AND cl_sortkey_prefix <> ''
GROUP BY cl_sortkey_prefix
  HAVING COUNT(*) > 1;

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SQL

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