FK relationship in MySQL in WorkBench IDE

i'm having trouble creating a one to many foreign key relationship between two InnoDB tables that I have created in my MySQL db using the workbench IDE. I'm using this in conjuction with vs 2010 and the entity framework. so i'm looking for some visual aids (tutorials preferably) that address this and show me the proper way to achieve this. Any suggestions and or suggested resources would be appreciated.
LVL 1
Michael SterlingWeb Applications DeveloperAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

dqmqCommented:
You implement a one-many relationship simply by including a key of the parent table (the one) in the child table (the many).  Usually, it is the primary key, but any unique key will do.

If you want the database to enforce the integrity of that relationship, then you use a foreign key constraint.  The foreign key constraint is a "rule" applied to the child table that guarantees the value of the foreign key will be present in the referenced unique key of the parent table.

alter table CHILDTABLE add constraint CONSTRAINTNAME foreign key (COL1, COL2...) references PARENTTABLE (COL1, COL2)

I haven't used MySQL IDE, but most development enviornments provide a graphical way to create the necessary keys and constraints.  Someone else will need to assist you with that.  
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Michael SterlingWeb Applications DeveloperAuthor Commented:
thank you. as a sidenote, good, bad or indifferent, can you have a primary key that is a character string?
0
dqmqCommented:
Absolutely!  But if it's longer than 16 bytes, I'd reconsider (for optimization reasons).
0
Michael SterlingWeb Applications DeveloperAuthor Commented:
thanks for your help....
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
.NET Programming

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.