Comments for Fred's Blog

Comment on Ancient Treasure by Wendell Ratigan

Wendell Ratigan — Wed, 28 Jul 2010 12:25:28 +0000

Interesting site man Thank you

Comment on 3 Normal Forms Tutorial by Pretty Geeks

Pretty Geeks — Wed, 07 Jul 2010 11:28:56 +0000

Nice and detailed article to clear concepts on urgent basis especially when have short time to prepare for Database interview. ThaNks

Comment on 3 Normal Forms Tutorial by Chatura

Chatura — Sun, 27 Jun 2010 09:34:17 +0000

Great Work!!!!

Very useful article.Keep it up the good work

Thank you

Comment on 3 Normal Forms Tutorial by Ravi

Ravi — Wed, 23 Jun 2010 06:14:41 +0000

It’s a well organized article which coverup the whole content of normalization…..

Thanks

Ravi..

Comment on 3 Normal Forms Tutorial by Mahesh

Mahesh — Mon, 14 Jun 2010 16:43:21 +0000

It is a wonderful article.It really cleared all my doubts in normalizing table.I guarantee that who ever reads this article must leave some comments.

Thanks
Mahesh

Comment on 3 Normal Forms Tutorial by Syed Jahangir Zafar

Syed Jahangir Zafar — Thu, 03 Jun 2010 11:23:55 +0000

realy i never seen this type of top level notes before at any where. keep it and moves to describe the database more topics like that.

Comment on 3 Normal Forms Tutorial by Snake

Snake — Sun, 30 May 2010 23:05:52 +0000

Thanks! Neat little article this. Using it to study for my exam !

Comment on 3 Normal Forms Tutorial by Nisha

Nisha — Thu, 27 May 2010 19:31:37 +0000

Articale is too good… The concept has been explained in so neat fashion. Kudos….
Would have been nice, if we had continued with BCNF and 4NF too…

Comment on 3 Normal Forms Tutorial by Bob Schmidt

Bob Schmidt — Fri, 21 May 2010 18:50:41 +0000

Correction…
I would like your opinion on a this: your model would still be in 3NF if you were to drop the ORDER entity and instead ORDER_LINE resolves the m:m between CUSTOMER and ITEM. Order date repeats on each line as does order number. Order number is not a key, just a tag. I know this is not customary.

My reasoning is:
1) Nothing in the forms dictates that we eliminate repetition of a data value. And I do think that mulling this over is worthwhile.
2) The only consequential fact is that the customer wants the item.
3) The implementation of this model has resulted in false rules in that some order processing systems will not allow order lines to be moved between orders.

If it is true that the ORDER is composed of lines such that a different set of lines constitutes something different, then your model stands.

Of course, this is my opinion and I would love a response.

Comment on 3 Normal Forms Tutorial by Bob Schmidt

Bob Schmidt — Fri, 21 May 2010 14:51:12 +0000

Thank for this and trusting you will not object, I am going to post a link to your pdf in an email I am distributing here at work.

Your work is far better than what is found on Wikipedia, I would love for you to get it linked there. It is better than the top 5 links found in Google.

I would like your opinion on a this: your model would still be in 3NF if you were to drop the INVOICE entity and instead have a simple m:m between order line and customer. I know this is not customary.

If it is true that the ORDER is composed of lines such that a different set of lines constitutes something different, then your model stands.

Of course, this is my opinion and I would love a response.

- Bob Schmidt