[Informatics] Data normalisation

[Mark]

I would have thought that if the sender of a message said that the post was
not intended for the list, recipients would delete it, and certainly not
respond to its contents.

On Tuesday, 4 October 2016, Robert Hind <robert at yinnar.com> wrote:

> Well Litsa you did send the ppt files to all of us and I was interested
> enough to have a look at the example file.
>
> Now I must take exception to slides 26 and 27 - pics below
>
> Both the statements on yellow background are false. The HouseColor depends
> only on the HouseName (or vice versa), not directly on the StudentID.
>
> As almost noted in slide 28 " These two non-key fields are more dependent
> on each other than they are on the primary key"
>
> The key 3NF rule here is: *"remove to a new table any non-key attributes
> that are more dependent on other non-key attributes than the table key"*
>
> So we move HouseName and HouseColor to a new table and leave just
> HouseName in the Student table.
>
> Robert Hind
> Ex Traralgon and Ashwood
> Retired
>
>
> ------------------------------
> *From:* informatics-bounces at edulists.com.au
> <javascript:_e(%7B%7D,'cvml','informatics-bounces at edulists.com.au');>
> [mailto:informatics-bounces at edulists.com.au
> <javascript:_e(%7B%7D,'cvml','informatics-bounces at edulists.com.au');>] *On
> Behalf Of *Litsa Tzelepis
> *Sent:* Tuesday, 4 October 2016 2:54 PM
> *To:* Year 12 VCE Informatics Teachers' Mailing List
> *Subject:* [Informatics] Data normalisation
>
>
>
> --
> Litsa Tzelepis
> Mount St. Joseph Girls' College
> 133 Maidstone Street, Altona, VIC. 3018
> htzelepis at msj.vic.edu.au
> <javascript:_e(%7B%7D,'cvml','htzelepis at msj.vic.edu.au');>
> P:8398 2000 | F:9398 3498
>
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-- 

Mark Kelly

mark at vceit.com
http://vceit.com
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