SQL (Oracle) 外键问题

Question

我在 apex(Oracle) 中设置 FOREIGN KEY 时遇到问题。首先我创建了地址表：

CREATE TABLE Address
(
  AddressID integer NOT NULL PRIMARY KEY,
  Country varchar2( 25 ) NOT NULL,
  City_Village varchar2( 25 ) NOT NULL,
  Street varchar2( 30 ) NOT NULL,
  HomeNumber varchar2( 10 ) NOT NULL,
  Apartment integer NULL
);

我尝试创建一个表客户端：

CREATE TABLE Client
(
  ClientID integer NOT NULL PRIMARY KEY,
  LastName varchar2( 25 ) NOT NULL,
  FirstName varchar2( 25 ) NOT NULL,
  BirthDate Date NOT NULL,
  Sex char( 1 ) NOT NULL,
  PhoneNumber varchar2( 15 ) NULL,
  Email varchar2( 25 ) NULL,
  IDNP varchar2( 13 ) UNIQUE NOT NULL,
  AddressId integer FOREIGN KEY REFERENCES Address( AddressID )
);

错误是 ORA-00907: 缺少右括号

我的代码有什么问题？有人可以帮帮我吗？

Answer 1

试试这个

CREATE TABLE Client
(
  ClientID integer NOT NULL PRIMARY KEY,
  LastName varchar2( 25 ) NOT NULL,
  FirstName varchar2( 25 ) NOT NULL,
  BirthDate Date NOT NULL,
  Sex char( 1 ) NOT NULL,
  PhoneNumber varchar2( 15 ) NULL,
  Email varchar2( 25 ) NULL,
  IDNP varchar2( 13 ) UNIQUE NOT NULL,
  AddressId integer REFERENCES Address( AddressID )
);

ORA-00907: missing right parenthesis

Answer 2

CREATE TABLE Client
(
  ClientID integer NOT NULL PRIMARY KEY,
  LastName varchar2( 25 ) NOT NULL,
  FirstName varchar2( 25 ) NOT NULL,
  BirthDate Date NOT NULL,
  Sex char( 1 ) NOT NULL,
  PhoneNumber varchar2( 15 ) NULL,
  Email varchar2( 25 ) NULL,
  IDNP varchar2( 13 ) UNIQUE NOT NULL,
  AddressId integer ,
  FOREIGN KEY AddressID REFERENCES Address( AddressID )
);