use elwiki_p;

select concat(substr(rev_timestamp,5,2),"-",substr(rev_timestamp,1,4)) as month_year,actor_name as user,count(actor_name) as No_of_articles, sum(rev_len) as Bytes

from

    change_tag,change_tag_def,revision,page,actor

where ct_tag_id = ctd_id

    and rev_id=ct_rev_id

    and page_id=rev_page

    and page_namespace=0

    and page_is_redirect=0

    and actor_id=rev_actor

    and ctd_name = "contenttranslation-v2" 

    and rev_parent_id=0

    and substr(rev_timestamp,1,4)>"2017"

    group by month_year,actor_name

    order by month_year desc,No_of_articles desc, Bytes desc