On Wed, 18 Apr 2007, Richard Huxton wrote:
> And at the end of the day that's the root of the problem. It's easy to be
> lulled into "well it looks like a primary key" rather than being able to
> guarantee it.
In some of these cases it is guaranteed to be a primary key given all
available information at the time. The funny thing about unexpected
changes to a business model is that you never expect them.
--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD