Compare each top editor's total edits against the overall average

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

calculate the mean of all editors' edits. Then, for each top editor, subtract the overall average from their individual total to assess how much their contribution deviates from the average.

SQL

WITH total_edits AS(
  	SELECT 
  		rev_actor,
  		COUNT(DISTINCT rev_id) AS edit_count
  FROM revision
  WHERE rev_timestamp >= DATE_SUB(CURRENT_DATE(), INTERVAL 2 MONTH)
  GROUP BY rev_actor
),

average AS(
  SELECT 
  	ROUND(AVG(edit_count), 0) AS average_edits
  FROM total_edits
)

SELECT
	t.rev_actor,
    CONCAT(ROUND(((t.edit_count - a.average_edits) / a.average_edits) * 100 , 2), '%') AS percentage
FROM total_edits t, average a
ORDER BY t.edit_count DESC
LIMIT 5;

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