avg monthy editors for projects that have graduated Incubator

SQL

WITH 
	base_table AS (
      SELECT DISTINCT 
        rev_id, 
        rev_actor,
        rev_timestamp, 
        rev_len, 
        rev_parent_id,
        page_namespace, 
        page_id,
        actor_id,
        REGEXP_SUBSTR(page_title, 'Ws/hi') AS prefix,
      ug_group
      FROM 
        revision rev
      JOIN 
        page p
        ON rev.rev_page = p.page_id
      JOIN 
        actor a
        ON rev.rev_actor = a.actor_id
      JOIN
      	user u
      	ON a.actor_user = u.user_id
      LEFT JOIN
      	user_groups ug
      	ON ug.ug_user = u.user_id
      LEFT OUTER JOIN 
        recentchanges rc 
        ON rev.rev_id = rc.rc_this_oldid
      WHERE 
      	user_name IS NOT NULL AND
      	(ug_group NOT IN ("bot") OR
         ug_group IS NULL)
      HAVING 
        prefix <> ''),
  
	primary_metrics AS (
      SELECT
          prefix,
      	  page_namespace,
          COUNT(DISTINCT rev_id) AS edit_count,
          COUNT(DISTINCT actor_id) AS actor_count,
          COUNT(DISTINCT page_id) AS pages_count
      FROM
          base_table
      GROUP BY 
      	prefix),
      
	month_year AS (
      SELECT
      		*,
      		YEAR(rev_timestamp) AS year,
      		MONTH(rev_timestamp) AS month
      FROM 
      		base_table),
      
      monthly_grouping_before_grad AS (
    	SELECT 
        	prefix, 
        	month,
        	year,
    		COUNT(DISTINCT actor_id) AS editors_monthly_before_grad
    	FROM 
        	month_year
        WHERE
        	month > 9 AND
        	year > 2019
    	GROUP BY 
        	prefix, month, year)
            
     SELECT *
     FROM monthly_grouping_before_grad LIMIT 5
SQL

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