Using MySQL Join -

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i'm trying join 2 mysql tables staffid 1 , username tied staffid in table have username displayed 

select ost_ticket.staff_id, count(*) numbers  ost_ticket join ost_staff re on re.username = us.userid group ost_ticket.staff_id;

from i've been reading joins should work?

edit: i've ran , unknown column 'ost_ticket.staff_id' in field list

select us.staff_id, re.username, count(*) numbers  ost_ticket join ost_staff re on re.userid= us.staff_id group us.staff_id;

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