多选题 以下的查询语句中哪一个表示相等连接?
A．SELECT i.id_number, m.manufacturer_id
FROM inventory i, manufacturer m
WHERE i.manufacturer_id=m.manufacturerid;
B．SELECT i.id_number, m.manufacturer_id
FROM inventory i, manufacturer m
WHERE i.manufacturer_id=m.manufacturer_id(+);
C．SELECT i.id_number, m.manufacturer_id
FROM inventory i, manufacturer m
WHERE i.manufacturer_id(+)=m.manufacturer_id;
D．SELECT i.id_number, m.manufacturer_id
FROM inventory i, manufacturer m
WHERE i.manufacturer_id=i.manufacturer_id
AND i.id_number=2365;