WikiDay 2014 authors activity in 2017

SQL

use ukwiki_p;
select pa.page_title as "Стаття",
rev.rev_user_text as "Автор",
(
  select count(*) from revision r where r.rev_timestamp >= 20170101000000 and r.rev_user_text = rev.rev_user_text 
) as "Редагувань цьогоріч"
from categorylinks
join page pt on cl_to = "Статті_заходу_«Бібліотечний_ВікіДень»" and cl_type = "page"
and cl_from = pt.page_id and pt.page_namespace = 1
join page pa on pt.page_title = pa.page_title and pa.page_namespace = 0
join revision rev on pa.page_id = rev.rev_page and rev.rev_parent_id = 0
order by "Редагувань цьогоріч" desc, "Автор" desc
SQL

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