Re: recommendation of a free ER-Diagram software?
- From: Carel-Jan Engel <cjpengel.dbalert@xxxxxxxxx>
- To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 13 Oct 2004 15:45:37 +0200
Hi Guang,
In stead of ER modeling I prefer ORM (Object Role Modeling. Nice tool
for that was Infomodeler from Asymmetrix, until Visio bought that and
Microsoft bought Visio and more or less discontinued Informodeler. Good
part of the story that, in stead of an expensive product, Visiomodeler
is an 'unsupported product' edition, that can be downloaded for free at
http://www.microsoft.com/downloads/details.aspx?FamilyID=27FE6786-A439-4286-B8B6-7A9B84CFA709&displaylang=en
ORM takes a little time to learn, but I think it is far better in
communcating your idea's about the datamodel with the user. For
instance, you don't create the n:m relationship tables in the model, but
you simply model the n:m relationship between the objects. Visiomodeler
will take care of the connecting tables during the generation process.
Just give it a try, it's free.
Best regards,
Carel-Jan Engel
===
If you think education is expensive, try ignorance. (Derek Bok)
===
* On Wed, 2004-10-13 at 15:28, Guang Mei wrote:
> Hi:
>
> I am looking for a free ER-Diagram software for my own personal use. I
> have used ER/Studio (a commercial package) heavily before and I liked it.
> But I couldn't afford it now. Is there some kind of freeware there that
> people like?
> My requirements are
>
> 1. run on Microsoft PC
> 2. GUI Interface, so I can draw ER diagram to create tables and
> constraints
> 3. can "export" the diagram into Image file
> 4. can generate DDL script from the ER diagram.
>
> Thanks.
>
> Guang
>
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