New users' thanks

SQL

use kowiki_p;

select A.user_name, A.user_editcount
from 

	(select user_id, user_name, user_registration, user_editcount
    from user
	where
		(user_registration < timestamp('2018-04-01')
    	and
    	user_registration >= timestamp('2018-03-01')
    	and
        user_editcount > 0)) as A
        
    #left join
    join
    (select rev_user_text, rev_timestamp
    	from revision
        where
    	(rev_timestamp < timestamp('2018-06-01') and rev_timestamp >= timestamp('2018-05-01'))
    	group by rev_user_text) as B
        
    on A.user_name = B.rev_user_text;
    #where (B.rev_user_text is null);
SQL

Checking query status...
