Explaining flat v. relational

[ljm]

I am working with a client who has a db which was virtually flat - it did have one table relationship, but should have had quite a few. Overall skills here are based on a flat model and I would like to make it easy for them to embrace the relational model. At the moment I feel that building that bridge is quite challenging because they are used to the conveniences of a large flat file. Is there an article or summary anyone could recommend to help with this education process?

Thank you

[T-Square]

Well, you could try: http://kb.iu.edu/data/ahrp.html

or: http://en.wikipedia.org/wiki/Database

followed by: http://en.wikipedia.org/wiki/Relational_model

(This last is probably overkill).

HTH,

David