"Al" <question2004_at_btinternet.com> wrote in
news:cm44jh$faa$1_at_hercules.btinternet.com:
> 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 an example showing 1NF to 4NF..
>>
>>Al
>
>
stop multi-posting
Received on Sun Oct 31 2004 - 19:59:53 CST
