Re: A pk is *both* a physical and a logical object.

Jan Hidders wrote:
[...]
> To answer the question, I think that is quite simple. As defined in
> the relational model it is a logical concept. As far as I know the SQL
> standard does not state that a PK implies an index (but I could be
> wrong)

I think you are right. Indexes are not even part of core sql, so it seems highly unlikely that it is stated that a PK should imply an index.

/Lennart

[...] Received on Thu Jul 12 2007 - 09:17:35 CDT