sql：ORA-02270：此列列表没有匹配的唯一键或主键

Question

我正在完成我的第一份家庭作业，但我无法正常工作。表格电影和明星的工作完全正常，但是当我尝试创建表格角色时，它会给我这个错误：ORA-02270：此列列表没有匹配的唯一键或主键

create table movie(id integer,
               title varchar(50),
               rating varchar(10),
               genre varchar(15),
               budget integer,
               unique(id,title),
               constraint moviekey primary key(id));

create table star(id integer,
              name varchar(30),
              birth_year integer,
              gender varchar(10),
              salary integer,
              primary key(id,name),
              constraint fk_mov_star foreign key (id) references movie(id) on delete cascade);

create table role(m_id integer,
              s_id integer,
              character_name varchar(40),
              primary key(m_id,s_id,character_name),
              constraint fk_mid_rol foreign key (m_id) references movie(id) on delete cascade,
              constraint fk_sid_rol foreign key (s_id) references star(id));

Answer 1

原因：“star（id）”是表星的外键，实际上是指“movie（id）”。

溶液： 将星号（id）设为主键;从星号中删除外键;

create table movie(id integer,
               title varchar(50),
               rating varchar(10),
               genre varchar(15),
               budget integer,
               unique(id,title),
               constraint moviekey primary key(id));

create table star(id integer,
              name varchar(30),
              birth_year integer,
              gender varchar(10),
              salary integer,
              primary key(id) );

create table role(m_id integer,
              s_id integer,
              character_name varchar(40),
              primary key(m_id,s_id,character_name),
              constraint fk_mid_rol foreign key (m_id) references movie(id) on delete cascade,
              constraint fk_sid_rol foreign key (s_id) references star(id));