Non-bot revisions and typed commend length average per day

SQL

#SELECT
#    COUNT(rc_bot) AS num_revisions,
#    AVG(true_comment_length) AS avg_comment_length,
#    AVG(num_revisions_per_day) AS avg_revisions_per_day
#FROM (
    SELECT
        rc.rc_bot,
        cr.comment_text,
        LENGTH(
            -- Remove /* */ comments from the comment_text
            REGEXP_REPLACE(cr.comment_text, '/\\*.*?\\*/', '') 
        ) AS true_comment_length,
        #DATE(FROM_UNIXTIME(rc.rc_timestamp)) AS revision_date,
        #COUNT(*) AS num_revisions_per_day
    FROM
        recentchanges rc
    JOIN
        comment_recentchanges cr ON rc.rc_comment_id = cr.comment_id
    WHERE
        rc.rc_bot <> 1 AND
        rc.rc_source = "mw.edit" AND
        NOT cr.comment_text LIKE 'Undid revision%' AND
        NOT cr.comment_text LIKE 'Restored revision%' 
    #GROUP BY
    #    revision_date
    LIMIT 10
#) AS latest_non_bot_revisions;
SQL

Checking query status...
