创建具有引用两个外键的复合主键的表

Question

我正在尝试使用MySQL创建下表：

CREATE TABLE registrations (
    eventNumber CHAR(3) UNIQUE NOT NULL
        CHECK (EXISTS (SELECT eventNumber FROM events)),
    employeeNumber CHAR(5) UNIQUE NOT NULL 
        CHECK (EXISTS (SELECT employeeNumber FROM employees)),

    PRIMARY KEY(eventNumber , employeeNumber ),

    FOREIGN KEY (eventNumber) REFERENCES eventNumber (employees)
        ON UPDATE RESTRICT 
        ON DELETE RESTRICT,
    FOREIGN KEY (employeeNumber ) REFERENCES employeeNumber(employees)
        ON UPDATE RESTRICT 
        ON DELETE RESTRICT  
) ENGINE=InnoDB;

但是，运行命令时出现无法创建表错误（1005）。 这里可能出什么问题了？

Answer 1

供参考，我弄错了REFERENCES语句。

它实际上应显示为：

REFERENCES <table name>(<attribute name>)