Articles with most langlinks in one wiki, missing from another

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

*** May require further optimization for huge wikis (e.g. EN as source wiki). Additional condition on temporary dataset (before sort and limit) would be helpful, maybe limit via minimal number of langlinks for page to be considered.

SQL

USE skwiki_p;  -- articles from SK with most langlinks...

SELECT 
    page_title, count(*) ll_count
  FROM 
    page, langlinks
  WHERE
    ll_from = page_id and
    page_id not in (select ll_from from langlinks where ll_lang = 'cs') and
      -- ... with no direct iw equivalent in CS
    page_namespace = 0
  GROUP BY
    page_id
  ORDER BY 
    ll_count desc, page_title
  LIMIT
    10;

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