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(rev_id) AS edit_count
  FROM revision
  WHERE rev_timestamp >= DATE_SUB(CURRENT_DATE, INTERVAL 3 MONTH)  
  GROUP BY rev_actor
),
overall_average AS (
  SELECT 
    ROUND(AVG(edit_count), 0) AS avg_edits
  FROM total_edits
)

SELECT 
	 te.rev_actor,
  concat(ROUND(((te.edit_count - oa.avg_edits) / oa.avg_edits) * 100, 2), '%')  AS percentage_above_average
FROM total_edits te, overall_average oa 
ORDER BY te.edit_count DESC
LIMIT 5;

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