Index pages by authors born or died a multiple of 100 years ago

SQL

use itwikisource_p;
select 
  concat('[[Indice:', replace(indice.page_title, '_', ' '), ']]')							Indice,
  (select replace(cat_title, 'Pagine_indice_SAL_', '')
   from category join categorylinks on cat_title = cl_to 
   where cl_from = indice.page_id and cat_title like 'Pagine_indice_SAL_%') 				SAL,
  concat('[[Autore:', autori.autore, '|', replace(autori.autore, '_', ' '), ']]') 			Autore,
  (select replace(cat_title, 'Nati_nel_', '')
   from category join categorylinks on cat_title = cl_to 
   where cl_from = id_autore and cat_title like 'Nati_nel_%') 								Nascita,
  (select replace(cat_title, 'Morti_nel_', '')
   from category join categorylinks on cat_title = cl_to 
   where cl_from = id_autore and cat_title like 'Morti_nel_%') 								Morte
from category cat
join categorylinks catlink on cat.cat_title = catlink.cl_to
join page indice on catlink.cl_from = indice.page_id
join (
  select author.page_title autore, author.page_id id_autore
  from page author
  join categorylinks catlink2 on author.page_id = catlink2.cl_from
  where cl_to in (
    select cat_title
    from category
    where cat_title rlike concat('Nati_nel_[0-9][0-9]', DATE_FORMAT(now(), '%y')) 
       or cat_title rlike concat('Morti_nel_[0-9][0-9]', DATE_FORMAT(now(), '%y'))
  ) 
) autori on cat_title = concat('Libri_di_', autori.autore)
order by Indice
SQL

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