WLM MMXII-MMXV in Ukraine participant number

SQL

-- it is supposed to be counter of all participants from WLM MMXII - MMXV in Ukraine.
-- Number should count unique users and not just sum up the nums for all 4 cats

SELECT DISTINCT rev_user_text
FROM commonswiki_p.revision 
WHERE rev_parent_id = 0
AND rev_page IN(
  SELECT cl_from
  FROM commonswiki_p.categorylinks
  WHERE 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"
  )
)
ORDER BY rev_user_text ASC

SQL

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