Re: a problem about database modeling

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 21 Jul 2006 01:23:42 GMT
Message-ID: <y0Wvg.13020$pu3.299367@ursa-nb00s0.nbnet.nb.ca>

dxuranus wrote:

> Neo wrote:
>

>>>i list my sql code here table device: CREATE TABLE `equ` ( ....
>>
>>There is no simple, normalized and NULL-less solution to your problem
>>with a RMDB. If you could post some actual data, I can show how dbd
>>handles it and one of the RM experts can design a schema that meets
>>your needs. What exactly are you needs? Are you trying to avoid NULLs
>>and or redundant data or more than X number of tables?

>
> the model is simple i hava device and every device has there own
> attributes and also the device type should be one of device's
> attibute.but the point is every type has there own attributes. so i
> do't know how to modeling this.
> i need avoid NULLs and redundant both.
> thanks for any help!

What was your objection to joins again? Received on Thu Jul 20 2006 - 20:23:42 CDT