"joel garry" <joel-garry_at_home.com> schreef in bericht
news:1193164789.050463.291360_at_i13g2000prf.googlegroups.com...
> On Oct 23, 8:59 am, "Shakespeare" <what..._at_xs4all.nl> wrote:
>> "Brian Peasland" <d..._at_nospam.peasland.net> schreef in
>> berichtnews:471dfb7b$0$26455$88260bb3_at_free.teranews.com...
>>
>>
>>
>>
>>
>> > Henrootje wrote:
>> >> I did not say that Visio is free. I am legally using Visio, that is
>> >> why I wanted to use it.
>> >> I am doing a degree in ICT (Bachelor of ICT) besides my job. One of
>> >> the courses is desiging databases. That is why I want to analyze
>> >> existing database structures.
>> >> But according to the reactions here Visio is not the right tool to do
>> >> this.
>> >> Then I have to look for an alternative but budget is limited. I hoped
>> >> there would be some tool(s) I could use to help me analyse existing
>> >> databases.
>> >> If you know of any good tools, I would like to know which those would
>> >> be. Maybe I can find some student licensing program.
>> >> But since I just started things do no t need to be overly complicated.
>> >> Is there anything you can point me too?
>>
>> >> TIA, Henro
>>
>> > One of the tools I've used in the past is Happy Fish (weird name...).
>> > You
>> > can find this tool here:
>>
>> >http://www.polderij.nl/happyfish/
>>
>> > The tool is not free, but it is relatively inexpensive.
>>
>> > HTH,
>> > Brian
>>
>> > --
>> > ===================================================================
>>
>> > Brian Peasland
>> > d..._at_nospam.peasland.net
>> >http://www.peasland.net
>>
>> > Remove the "nospam." from the email address to email me.
>>
>> > "I can give it to you cheap, quick, and good.
>> > Now pick two out of the three" - Unknown
>>
>> > --
>> > Posted via a free Usenet account fromhttp://www.teranews.com
>>
>> I wonder how a tool can create an ERD from a database, since the steps
>> from
>> ERD to Datamodel are not 1 on 1..... Some decisions like resolving arcs,
>> m-n
>> relationships, (de)normalization etc will "disappear" in the process.
>>
>> <quote>
>> Happy Fish combines ERD design with live database access to query or
>> maintain an already developed database.
>> <end quote>
>>
>> I think they confuse an ERD with a Data Model Diagram....
>>
>> Still looks useful though......
>>
>> Shakespeare
>> (What's in an ERD)
>
> And other things will mysteriously appear, for example, constraints
> between relationships. ("What's not in an ERD", so to speak).
>
> I think that's all just showing the limitations inherent in moving
> from design to implementation, then going into reverse. If you have
> something poorly designed and/or implemented, there's going to be some
> real doozies. For ongoing maintenance, there's going to be a need for
> this type of tool, regardless. The more automated it can be, and the
> bigger the system, the more helpful. If reversing into design can't
> be made to work, that's a good sign to junk it all and start over.
>
> jg
> --
> @home.com is bogus.
> http://www.signonsandiego.com/firemap/
>
I agree!
BTW: I checked it out (had some spare time) and indeed, it's not an ERD but
a database diagram...
Shakespeare
Received on Fri Oct 26 2007 - 03:43:53 CDT
