Introduction to Foreign Keys?

I'm relatively new to Rails and SQL. I've been working on an
application for a while now, and I feel that I could really benefit
from an introduction to using foreign keys both in SQL and Rails. Is
such an introduction available? Where would I find one?

Thanks,

   - Raffi.

It's hard to say just how low level you should start. But the Agile Development with Rails book contains a bit of info on foreign keys and is a pretty good read in general.
-Mat

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On Jul 23, 2006, at 12:35 PM, raffir@gmail.com wrote:

I'm relatively new to Rails and SQL. I've been working on an
application for a while now, and I feel that I could really benefit
from an introduction to using foreign keys both in SQL and Rails. Is
such an introduction available? Where would I find one?