Re: Design Question - Thoughts Needed

I would go for creating a separate table for coverage , to make design more flexible. If you add 10 cols in vehicle table and and a new coverage is added later you will have to alter your table. Still you think performance and space you can cluster the two tables . -Big P

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Monday, June 25, 2001 10:15 AM

> We are looking to redesign our current system and a question popped up
that I
> am struggling with. (our business is auto insurance). Each vehicle on a
> policy may have 1 or many coverages. For example, comprehensive,
collision,
> towing, property damage ... A couple of things: 1- some coverages will
not
> apply because they are state specific. 2 - some coverages will not be
chosen
> by the insured. Therefore, should I have a vehicle table with each
coverage
> and its premium as separate specific columns or should I add a coverage
table
> which will contain the coverage and premium. Under the later example if I
have
> 10 coverages and I want to print them on the insured's declaration page
don't I
> have a possible performance problem with up to 10 i/os. Where as with the
> first example I only have 1 read but possible space wastage. I know in
1st
> normal form you should remove repeating groups, in my case is a coverage a
> repeating group? Where do you draw the line? For example, clients may
have
> multiple phone numbers although I don't see many examples where the phone
> numbers are split into another table. Please share any thoughts that may
make
> my decision easier. Thanks
>
> Just an fyi, in our current design the coverages have been stored with the
> vehicle.
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Tracy Rahmlow
> INET: Tracy.Rahmlow_at_aexp.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Big Planet
  INET: bigplanet34_at_hotmail.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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