Database model question

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dingchi88@gmail.com - 25 Jun 2008 16:11 GMT

Hi everyone;

I want to write a report about database model, and i
plan to write 3 models which are Network Model,Hierarchical Model, and
relational model.

Since I only used relational database be4 which are
mysql and MS access. I am quite familar wi the other 2. Can anybody
give me a suggestion about what areas I can write for those two,
something like mapping,application, structure..........something like
that.and anything that I can compare..?

really appreciate!!!! and any reference and
recourse i can use,plz give me a hand.~~~

Thx!!!!!!!!!!!!!!!!!!!

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dingchi88@gmail.com - 25 Jun 2008 16:17 GMT

On Jun 25, 11:11 am, dingch...@gmail.com wrote:

> Hi everyone;
>
[quoted text clipped - 12 lines]
>
> Thx!!!!!!!!!!!!!!!!!!!

sorry I want to say i am "not" familar wi the other 2 model........lol

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Mike John - 06 Jul 2008 07:38 GMT

Some places to Start:

For hierarchical probably IMS (from IBM) is the best-known implementation
although some network features were added to it.
For network type systems google for descriptions of products called IDMS and
the Codasyl "Data Base Task Group" (DBTG).
For relational the works of E.F.,Codd and C.J.Date will give you a good
start. Be prepared to discover that many will NOT regard the two systems you
name as "relational" and your entire report could turn in to "Is SQL really
relational".

Good Luck!

Mike John

On Jun 25, 11:11 am, dingch...@gmail.com wrote:

> Hi everyone;
>
[quoted text clipped - 12 lines]
>
> Thx!!!!!!!!!!!!!!!!!!!

sorry I want to say i am "not" familar wi the other 2 model........lol

Reply to this Message

David Portas - 06 Jul 2008 23:56 GMT

On Jun 25, 11:11 am, dingch...@gmail.com wrote:

> Hi everyone;
>
[quoted text clipped - 12 lines]
>
> Thx!!!!!!!!!!!!!!!!!!!

Introduction to Database Systems, C.J.Date:
http://www.amazon.com/Introduction-Database-Systems-8th/dp/0321197844

As Mike already mentioned, MySQL and Access are not relational.

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David Portas

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