Errors when adding two foreign key statements

Question

1.00/5 (1 vote)

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I get the error

Quote:
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 student (no), FOREIGN KEY c_no REFERENCES course (no) )' at line 6

when i try to run the table score.

Quote:

CREATE TABLE Persons
(
    id_P int,
    LastName varchar(255),
    FirstName varchar(255),
    Address varchar(255),
    City varchar(255)
);

CREATE TABLE dept
(
    no int(30) NOT NULL,
    name varchar(50) NOT NULL,
    PRIMARY KEY (no)
);

CREATE TABLE student
(
    no int(50) NOT NULL,
    name varchar(255),
    gender varchar(10) check (gender in('female', 'male')),
    age int(10),
    d_no int(20) NOT NULL,
    PRIMARY KEY (no),
    FOREIGN KEY (d_no) REFERENCES dept(no) 
);

CREATE TABLE course
(
    no int(100) NOT NULL,
    name varchar(100) NOT NULL,
    credit int NOT NULL,
    PRIMARY KEY (no)
);

CREATE TABLE score 
(
    s_no int(40) NOT NULL,
    c_no int(40) NOT NULL,
    score int(40) NOT NULL,
    FOREIGN KEY s_no REFERENCES student (no),
    FOREIGN KEY c_no REFERENCES course (no)
);

What I have tried:

i have read the code over and over but to no avail.

Posted 11-Nov-21 21:30pm

Titi M

Updated 11-Nov-21 22:04pm

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CHill60 · Accepted Answer · 2021-11-11T22:04:00

Compare

SQL

CREATE TABLE student
(
    no int(50) NOT NULL,
    name varchar(255),
    gender varchar(10) check (gender in('female', 'male')),
    age int(10),
    d_no int(20) NOT NULL,
    PRIMARY KEY (no),
    FOREIGN KEY (d_no) REFERENCES dept(no) 
);

which works, with

SQL

CREATE TABLE score 
(
    s_no int(40) NOT NULL,
    c_no int(40) NOT NULL,
    score int(40) NOT NULL,
    FOREIGN KEY s_no REFERENCES student (no),
    FOREIGN KEY c_no REFERENCES course (no)
);

which does not work. Spot the difference? Parentheses.

SQL

CREATE TABLE score 
(
    s_no int(40) NOT NULL,
    c_no int(40) NOT NULL,
    score int(40) NOT NULL,
    FOREIGN KEY (s_no) REFERENCES student (no),
    FOREIGN KEY (c_no) REFERENCES course (no)
);