Question

I want to create a table relationship with MYSQL PHPMYADMIN.
But NOT with the constraint.

Here is what i did:

CREATE TABLE runs (
code_teachers int(8),
code_department int(8),
primary key(code_teachers, code_department),
foreign key(code_teachers)references teachers,
foreign key(code_department)references department
);

So as you can see i am trying to create table relation named runs between code_teachers from teachers create table and code_department from department create table.

But for some UNKNOWN reason it just DOESN’T make the relation when i enter desinger.
So if anyone knows the answer to my problem you are welcome to tell me cause ima go crazy here.

Answer 1

Did you try

FOREIGN KEY ( columnName ) REFERENCES tableName(columnName)

tableName seems to be missing from your query.
Foreign keys need to reference columns from other tables.

Wikipedia says :

• In the context of relational databases, a foreign key is a
referential constraint between two tables. A foreign key is a field
in a relational table that matches a candidate key of another table.
The foreign key can be used to cross-reference tables.

mySQL.com says :

• Foreign key relationships involve a parent table that holds the
central data values, and a child table with identical values pointing
back to its parent. The FOREIGN KEY clause is specified in the child
table.