USE fawiki_p;

SELECT revision.rev_user_text, count(revision.rev_id) as edits , left(newuser.min_t,6) as first_edit FROM revision join 

(SELECT rev_user, min(rev_timestamp) as min_t FROM revision group by rev_user) as newuser where newuser.rev_user=revision.rev_user and rev_timestamp < 20160101000000 and rev_timestamp > 20150101000000 

group by rev_user_text;