"Al" <question2004_at_btinternet.com> wrote in
news:cm44mu$igd$1_at_sparta.btinternet.com:
> You mean you don't know the answer!! Senior DBA?
>
>
> "Sybrand Bakker" <gooiditweg_at_sybrandb.verwijderdit.demon.nl> wrote in
> message news:s5qao0t1rvvkrejr2ck5dlti48ho9pp45p_at_4ax.com...
>> On Sun, 31 Oct 2004 19:10:29 +0000 (UTC), "Al"
>> <question2004_at_btinternet.com> wrote:
>>
>>>Hi
>>>Can any one help me understand the difference between 4NF and 1NF. These
>>>both refer to a field that has more than one value - so what is the
>>>difference?
>>>
>>>All books I have looked at only consider the 4NF on its own and
>>>none of them shows an example starting from 1NF and going through all
>>>stages
>>>right to 4NF.
>>>So it is difficult for me to see why the multi-valued field has not been
>>>taken out
>>>when examining the repeating groups at the stage of 1NF.
>>>
>>>I appreciate a clear explanation or full example showing 1NF to 4NF..
>>>
>>>Al
>>>
>>
>>
>> How much are you willing to pay? This is really an 'assignment'
>> (probably also your homework) of several hours, so beyond the scope of
>> a *volunteer* newsgroup.
>>
>>
>> --
>> Sybrand Bakker, Senior Oracle DBA
>
>
Stop top posting.
Google is your friend.
http://www.livewiredg.myby.co.uk/supernorm/
files/Normalisation%20Website.swf
watch line wrap above
http://databases.about.com/library/weekly/aa080501a.htm
Received on Sun Oct 31 2004 - 20:01:07 CST
