Re: Fragmentation question.

From: Francesco Dini <dini.f_at_adr.it>
Date: Wed, 05 May 1999 10:35:37 +0200
Message-ID: <373002D9.A7EF258F@adr.it>

I think that horizontal fragmentation is that inside the row of a table: if a row is often updated it is possible for it to raise the problem of migration and chaining. I think that horizontal fragmentation is concerned about these two problems.

Abhimanyu Parasher wrote:

> Hi!
> Thanks for reading this. I need an urgent help to understand the concept of data fragmentation in the case of ORACLE.
>
> What does Horizontal fragmentation mean in the case of ORACLE? Does it mean that we hold separate copies of fragmented tables in different databases ? Because, if it is like that then the constraint policy of Primary key wouldn't hold good on such kind of data.
> So, what actually it means ?
>
> Please reply asap.
>
> Thanks
>
> Abhimanyu Parasher
>
> --
>
>
>
Received on Wed May 05 1999 - 03:35:37 CDT