Unexisting categories on plwiki

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

Zmodyfikowana wersja https://quarry.wmflabs.org/query/2208

SQL

USE plwiki_p;
SELECT CONCAT('[[:Kategoria:',cl_to,']]') AS Kategoria, COUNT(*) AS Liczba_artykułów
FROM page, categorylinks
WHERE page_id = cl_from
AND page_namespace = 0
AND NOT EXISTS
(SELECT * FROM page AS p1
WHERE cl_to = p1.page_title
AND p1.page_namespace = 14)
GROUP BY cl_to
ORDER BY Liczba_artykułów DESC, Kategoria ASC;

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