Re: Poll: What percentage advantage are RDBMS vendors taking of the RM?

"Alan" <not.me_at_uhuh.rcn.com> wrote:

> Yes, it is clearer now. Another thought, though: Is a 100% relational
> RDBMS
> a good thing, or are some modifications a good idea after all?

When you start getting close to 100% I believe a range of issues will emerge that effectively resolve to different interpretations of a number of principles within the RM.

For example, Codd and Date's different approach to the way null values should be handled by the RDBMS. Is there one model, or two, and/or which path gets to *the* 100% ?

Setting aside these more contraversial issues, the over-riding principle (as it appears to me) is that you need a very good reason to diverge from the relational practice.

-- 
Pete Brown
IT Managers & Engineers
Falls Creek
Australia
www.mountainman.com.au