What type of query is this?

I am a newbie so please do not be so harsh. I am a pretty good at SQL but I want to get better. What type of query is this? (I know it contains a subquery because of the left join). Thanks in advance.
select site.site_name, company_m.company_name, hrs.employee_hrs
from OSHA_SITE_MASTER site
inner join OSHA_COMPANY_MASTER company_m
on site.company_id = company_m.company_id
left join
(
select employee_hrs, statmaster.site_id, begin_date_range
from OSHA_STATISTICS_MASTER statmaster
inner join OSHA_STATISTICS_DETAIL stat_detail
on stat_detail.statistic_master_id = statmaster.statistic_master_id
inner join osha_date_ranges as osha_date
on osha_date.date_range_id = statmaster.date_range_id
where osha_date.begin_date_range = '1/1/2007'
) as hrs
on hrs.site_id = site.site_id
where company_m.company_id = 11

Thanks Guys. I needed to know so if i am looking for help on queries like this, I will know how to search for them.