使用复合键给我错误时添加外键约束

Question

我正在尝试创建三个表但是我收到错误

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'REFERENCES personal_details(personID)
)'

以上错误适用于第三个表，即表hobbies_person。

我正在创建表格如下。

CREATE TABLE personal_details (
    personID   INT PRIMARY KEY,
    firstName  varchar(30),
    middleName varchar(30),
    lastName   varchar(30),
    age        INT,
    aboutMe    varchar(500)
);

CREATE TABLE hobbies (
    hobbID    INT PRIMARY KEY,
    hobbName  varchar(30)
);

CREATE TABLE hobbies_person (
    personID INT,
    hobbID   INT,
    PRIMARY KEY (personID, hobbID),
    FOREIGN KEY personID REFERENCES personal_details(personID)
);

我也试过

CREATE TABLE hobbies_person (
    personID INT,
    hobbID   INT,
    PRIMARY KEY (personID, hobbID),
    FOREIGN KEY personID REFERENCES personal_details(personID),
    FOREIGN KEY hobbID   REFERENCES hobbies(hobbID)
);

但仍然是同样的错误。

Link to check query

知道如何解决这个问题吗？

注

在表格hobbies_person中，我使用复合主键作为PRIMARY KEY (personID, hobbID),

Answer 1

您需要将列personID括在FK定义的括号中：

CREATE TABLE hobbies_person (
    personID INT NOT NULL,
    hobbID   INT NOT NULL,
    PRIMARY KEY (personID, hobbID),
    FOREIGN KEY (personID) REFERENCES personal_details(personID)
);

Answer 2

您忘记了外键附近的()

FOREIGN KEY (personID) REFERENCES personal_details(personID)