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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Design Question - Thoughts Needed
I would have a three table set up.
Your policy detail table, your vehicle table, and your vehicle_policy lookup
table.
I generally use this format to resolve many to many. Most of the time you
either know the vehicle or policy type. Which will keep you in the lookup
table and only go to the appropriate records in the parent table.
"Walking on water and developing software from a specification are easy if both are frozen."
Christopher R. Spence
Oracle DBA
Fuelspot
-----Original Message-----
Sent: Monday, June 25, 2001 1:16 PM
To: Multiple recipients of list ORACLE-L
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.
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--
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 --------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists --------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Mon Jun 25 2001 - 13:51:49 CDT
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