Hywiki users by added and deleted bytes

SQL

use hywiki_p;
SELECT anon_1.rev_user AS anon_1_rev_user,
            sum(anon_1.byte_change) AS net_sum,
            sum(abs(anon_1.byte_change)) AS absolute_sum,
            sum(CASE
                    WHEN (anon_1.byte_change > 0)
                    THEN anon_1.byte_change
                    ELSE 0 END
               ) AS positive_only_sum,
            sum(CASE
                    WHEN (anon_1.byte_change < 0)
                    THEN anon_1.byte_change
                    ELSE 0 END
               ) AS negative_only_sum,
            user_registration,
            user_name
       FROM (SELECT revision.rev_user AS rev_user,
                    (   cast(revision.rev_len as signed)
                        - cast(coalesce(anon_2.rev_len, 0) as signed)
                    ) AS byte_change
               FROM revision
                        INNER JOIN
                    page        ON page.page_id = revision.rev_page
                        LEFT OUTER JOIN
                    (SELECT revision.rev_id AS rev_id,
                            revision.rev_len AS rev_len
                       FROM revision
                    ) AS anon_2 ON revision.rev_parent_id = anon_2.rev_id
              WHERE page.page_namespace IN (0)
            ) AS anon_1
       JOIN user ON user_id=rev_user
GROUP BY user_name
ORDER BY net_sum DESC
limit 100;
SQL

Checking query status...
