1
我一直收到一個錯誤,指出外鍵引用列表中的列數不等於引用列表中的列數。oracle引用列的數量必須與引用列匹配
這是我得到的錯誤。
foreign key(EID, Lastname, Firstname, Midinitial) references employee,
有誰知道爲什麼我得到這個錯誤?
create table employee(
EID varchar(20) primary key,
Lastname varchar(20),
Firstname varchar(20),
Midinitial char(1),
gender char(1),
street varchar(20),
city varchar(20)
);
create table works(
EID varchar(20) primary key,
Lastname varchar(20),
Firstname varchar(20),
Midinitial char(1),
company_name varchar(20),
salary numeric(5,0),
foreign key(EID, Lastname, Firstname, Midinitial) references employee,
foreign key(company_name) references company
);
create table company(
company_name varchar(20) primary key,
city varchar(20),
foreign key(city)references employee
);