COS 597D, Fall 2013
Questions on A Relational
Model of Data for Large Shared Data Banks
Due at 1:30pm, Monday September 16, 2013.
You may hand in a paper copy or email a file to me.
Keep a copy for your use during class discussion.
No credit for
late submission.
1. In this paper, Codd immediately raises the issue of data independence. In less
than a page, discuss the issue of data independence as Codd interprets
it. Independence from what? How were the
database systems of his day failing to be independent? Do these
concerns translate to the present day? Are there forms of
independence that we should be addressing now that were not present
circa 1970?
2. Codd's discussion of data
inconsistency relies on a lot of technical details about the
relational model, which I do not care that you to understand at
this point. In 3 or fewer sentences, describe what you believe
to be the high-level message regarding the relational model and data
inconsistency.