Question

I have created some SQL code to create 7 tables based off an ERD.

It seems to be extremely close to working, except that it says that

column “inv_no” referenced in foreign key constraint does not exist

However, the table invoice which inv_no is in is created, and has the column inv_no so I am very confused how it does not exist to create the other table invoiceLine which requires inv_no as a foreign key.

Here is my code:

CREATE TABLE invoice(

        inv_no          INTEGER         NOT NULL,
        cust_id         INTEGER         NOT NULL,
        inv_date        DATE            NOT NULL,
CONSTRAINT PK_invoice_inv_no PRIMARY KEY(inv_no),
CONSTRAINT FK_customer_cust_id FOREIGN KEY(cust_id) REFERENCES customer(cust_id)
);

CREATE TABLE invoiceLine(

        inv_line_no     INTEGER         NOT NULL,
        inv_line_qty    INTEGER         NOT NULL,
CONSTRAINT PK_invoiceLine_inv_line_no PRIMARY KEY(inv_line_no),
CONSTRAINT FK_invoice_inv_no FOREIGN KEY(inv_no) REFERENCES invoice(inv_no)
);

Again, the table in question is invoiceLine which seems to be dependent on inv_no in the invoice table.

If anyone can spot my error that would be great!

Answer 1

The error message is correct there is no column inv_no in invoiceline. You need to declare that column as well:

CREATE TABLE invoiceLine(
       inv_no          INTEGER         NOT NULL,
       inv_line_no     INTEGER         NOT NULL,
       inv_line_qty    INTEGER         NOT NULL,
CONSTRAINT PK_invoiceLine_inv_line_no PRIMARY KEY(inv_line_no),
CONSTRAINT FK_invoice_inv_no FOREIGN KEY(inv_no) REFERENCES invoice(inv_no)
);