sqlalchemy多表联合查询(join)

 使用outerjoin

instances = db.session.query(Instance.name, Instance.sep_status, User.email).outerjoin( User, Instance.user_id==User.id).filter(Instance.is_terminated==0)
        for instance in instances.all():
        pass

　　

 

但是还没搞清究竟怎么搞才对于mysql的inner join ,left,right