Oracle table 中缺少右括号错误

Question

CREATE TABLE Countries
    (CountryID INT NOT NULL PRIMARY KEY,
    CountryName VARCHAR2(100) NOT NULL,
    RegionID INT FOREIGN KEY REFERENCES Regions(RegionID)
    );

一直给我扔这个： ORA-00907: missing right parenthesis

我做错了什么？

Answer 1

内联外键语法不带 FOREIGN KEY 关键字。

考虑：

CREATE TABLE Countries (
    CountryID INT NOT NULL PRIMARY KEY,
    CountryName VARCHAR2(100) NOT NULL,
    RegionID INT REFERENCES Regions(RegionID)
);

或者，您可以在另一行声明外键，如下所示：

CREATE TABLE Countries (
    CountryID INT NOT NULL PRIMARY KEY,
    CountryName VARCHAR2(100) NOT NULL,
    RegionID INT,
    CONSTRAINT fkRegionID FOREIGN KEY (RegionID) REFERENCES Regions(RegionID)
);

这也有效：

CREATE TABLE Countries (
    CountryID INT NOT NULL PRIMARY KEY,
    CountryName VARCHAR2(100) NOT NULL,
    RegionID INT,
    FOREIGN KEY (RegionID) REFERENCES Regions(RegionID)
);

Demo on DB Fiddle

Oracle table 中缺少右括号错误

Missing right parenthesis error in Oracle table

sql

oracle

foreign-keys

create-table