(select GROUP_CONCAT(hygf_regional_companies.regional_companies_name) from hygf_regional_companies where hygf_regional_companies.unit_info_id=u.sequence_nbr ) regionalCompaniesName
from hygf_commerce_info c LEFT JOIN hygf_unit_info u on c.unit_seq=u.sequence_nbr LEFT JOIN hygf_dealer_review d on d.unit_info_id=u.sequence_nbr
from hygf_commerce_info c
LEFT JOIN hygf_unit_info u on c.unit_seq=u.sequence_nbr
LEFT JOIN hygf_dealer_review d on d.unit_info_id=u.sequence_nbr