我有一個問題添加一個外鍵到我的表在SQL
create table REALESTATE (
reale_id integer,
agents_id integer not null,
listing_id integer not null,
primary key (reale_id)
);
* 表創建 *
create table AGENTS (
agents_id integer,
agents_name char(10) not null,
agents_lname char(20) not null,
listing_id integer,
customer_id integer,
reale_id integer,
primary key (agents_id),
foreign key (customer_id) references AGENT (customer_id),
foreign key (reale_id) references REALESTATE (reale_id)
);
行錯誤9: ORA-00942:表或視圖不存在
create table CUSTOMER (
customer_id integer,
customer_name char(6) not null,
customer_lname char(15) not null,
agents_id integer,
primary key (customer_id),
foreign key (agents_id) references AGENTS (agents_id)
);
錯誤在第7行:ORA-00942:表或視圖不存在