2021 Pacific typhoon season analysis: Zero-diff edits by user

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

Part of [[w:en:User:Chlod/Analysis/2021 Pacific typhoon season]].

SQL

SET @page = "2021 Pacific typhoon season";

SELECT
	actor_name,
    COUNT(
      	IF((
      		CAST(r1.rev_len AS SIGNED) - 
      		CAST((
          		SELECT 
		         	r2.rev_len 
		        FROM revision r2
	         	WHERE r2.rev_id = r1.rev_parent_id
	        ) AS SIGNED)
        ) = 0, 1, NULL)
    ) as `Zero-diff edits`
FROM revision r1
JOIN `comment` ON rev_comment_id = comment_id
JOIN actor ON rev_actor = actor_id
WHERE 
    rev_page = (SELECT page_id FROM page WHERE page_namespace = 0 AND page_title = REPLACE(@page, " ", "_"))
GROUP BY actor_name

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