Your tables must be InnoDB, but otherwise, you can set up the keys
using raw SQL code in phpmyadmin:
CREATE TABLE parent (id INT NOT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;
CREATE TABLE child (id INT, parent_id INT,
INDEX par_ind (parent_id),
FOREIGN KEY (parent_id) REFERENCES parent(id)
ON DELETE CASCADE
) ENGINE=INNODB;
look at the manual for more examples:
http://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-
constraints.html
- Kevin
On Apr 20, 2007, at 2:31 PM, munene_uk wrote:
i know this is kinda not directly a flex question but i figure
surely someone must use mysql in here for a flex app.....
anyway here goes.....
just a quick question....ive got a database of students and i want
to somewhat design a relational database so that i can run
relational queries. unfortunately i dont know how to construct
foreign keys in mysql using phpmyadmin.
my idea was to have 4 tables namely
students
studentid
name
surname
address
etc
etc
enrolment
studentid <----foreign key
courseid <----foreign key
course
courseid
coursename
teachers
teacherid
teachername
the tables above are simplified and will probably contain much more
data.
my main prblem is that i dont know how to set up foreign keys
within phpmyadmin so that i can keep my database relational.
