Centralize talk pages of redirect

SQL

select GROUP_CONCAT(p1.page_title SEPARATOR ', '), p2.page_title from page p1
join redirect on p1.page_id = rd_from and rd_namespace = 0 -- and rd_fragment != ''
join page p2 on p2.page_title = rd_title and p2.page_namespace = 0
where p1.page_namespace = 0 and p1.page_is_redirect = 1
and p1.page_title in (
  select page_title from page where page_namespace = 1 and page_is_redirect = 0
  /*
  and page_id in (
    select tl_from from templatelinks where tl_target_id in (
      select lt_id from linktarget where lt_title in ('WikiProject_Disambiguation') and lt_namespace = 10
    )
  )
  */
  /*
  and page_id in (
    select tl_from from templatelinks where tl_target_id in (
      select lt_id from linktarget where lt_title in ('Talk_page_of_redirect') and lt_namespace = 10
    )
  )
  */
)
and p2.page_title not in (
  select page_title from page where page_namespace = 1 -- and page_is_redirect = 0
)
and p2.page_id IN (
  select cl_from from categorylinks
  where cl_to in ("All_disambiguation_pages", "All_set_index_articles") and cl_type = 'page'
)
group by p2.page_title
order by count(p1.page_title) desc
SQL

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