WLM-UA 2019 Photo Competition newcomers

SQL

use commonswiki_p;

SELECT actor_name
FROM revision r_prev
join categorylinks on rev_page = cl_from
join actor on rev_actor = actor_id and actor_user is not null
left join (
SELECT actor_name
FROM revision r_prev
join categorylinks on rev_page = cl_from
join actor on rev_actor = actor_id and actor_user is not null
WHERE rev_parent_id = 0
and cl_to IN (
  "Images_from_Wiki_Loves_Monuments_2012_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2013_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2014_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2015_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2016_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2017_in_Ukraine",
  "Images_from_Wiki_Loves_Monuments_2018_in_Ukraine"  
)  
  GROUP BY actor_name) t2 using actor_name
WHERE rev_parent_id = 0
and cl_to IN (
  "Images_from_Wiki_Loves_Monuments_2019_in_Ukraine"
)  
 GROUP BY actor_name
SQL

Checking query status...
