Re: On the usefulness of tables definitions in RM...
From: paul c <toledobythesea_at_oohay.ac>
Date: Fri, 20 Aug 2010 16:06:53 GMT
Message-ID: <xKxbo.153$89.14_at_edtnps83>
Date: Fri, 20 Aug 2010 16:06:53 GMT
Message-ID: <xKxbo.153$89.14_at_edtnps83>
On 20/08/2010 8:56 AM, paul c wrote:
...
> 1979 - "The fact that relations can be perceived as tables, and that
> tables are similar to flat files, breeds the false assumption that the
> freedom of action permitted [with] tables or flat files must also be
> permitted when manipulating relations. The manipulation differences are
> quite strong." Note that this was written after the first well-known
> implementations, such as System-R at IBM.
> ...
Sorry, I got the date wrong, this quote was from his book published I think in 1990, not 1979. Received on Fri Aug 20 2010 - 18:06:53 CEST