USE plwiki_p;

​

  SELECT actor_name, review_count, IFNULL(review_count_i, 0) as review_count_i

  FROM

  (

    SELECT count(*) as review_count, log_actor

    FROM logging_userindex 

    WHERE log_type = 'review' AND log_action = 'approve'

    GROUP BY log_actor

  ) r_next

  -- add initial reviews

  LEFT JOIN

  (

    SELECT count(*) as review_count_i, log_actor as log_actor_i

    FROM logging_userindex 

    WHERE log_type = 'review' AND log_action = 'approve-i'

    GROUP BY log_actor

  ) r_initial ON log_actor_i = log_actor

  -- actor_name  

  LEFT JOIN actor a ON actor_id = log_actor