select * from erack_location_address_match a ,erack_location_info_areamark b where a.erack_id=b.rack_name(+)
参考用select * from A left join B on A.id=B.id
select * from erack_location_address_match a left join erack_location_info_areamark b on a.erack_id=b.rack_name
select * from erack_location_address_match a inner join erack_location_info_areamark b on a.erack_id=b.rack_name