SQL
x
use ruwiki_p;
select * from page p1
where page_namespace = 14
and exists
(select * from categorylinks c0
where cl_to = page_title
and exists
(select * from page p2
where p2.page_id = cl_from
and exists
(select * from categorylinks c1
where c1.cl_to = p1.page_title
and exists
(select * from page p3
where p3.page_id = c1.cl_from
and not p2.page_namespace = p3.page_namespace
and not p2.page_namespace = 14
and not p3.page_namespace = 14))))
limit 10
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