Category descriptions with redlink in German Wikipedia

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

SQL

USE dewiki_p;
SELECT page_title, pl_namespace, pl_title
FROM page, pagelinks
WHERE pl_from_namespace = 14
      AND page_id = pl_from
      AND ( SELECT COUNT(*)
            FROM page
            WHERE page_title = pl_title
                  AND page_namespace = pl_namespace ) = 0;

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SQL

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