select concat(u.firstname, ' ', u.surname) as name, count(p.id) as count from tbl_products as p left join tbl_users as u on p.updater = u.id group by p.updater order by count desc;

select concat(u.firstname, ' ', u.surname) as name, count(p.id) as count from tbl_products as p left join tbl_users as u on p.updater = u.id where p.updated > now() - interval 1 week group by p.updater order by count desc;

select concat(u.firstname, ' ', u.surname) as name, count(p.id) as count from tbl_products as p left join tbl_users as u on p.updater = u.id where p.updated > now() - interval 1 day group by p.updater order by count desc;