How is the design for this complex requirement ? pls help..

Question

Hi All,
We have a Discount scheme that can be given for all possible
combination of all customer, area and product hierarchy (attached below).
for example :
Promotion No.001 =>for sales on : CustomerGroup 'A', Area 'B', and
ProductBrand 'C' will get discount 2 %
Promotion No.002 =>for sales on : AllCustomer, District 'D', and
Product 'E' will get discount 2.5 %
Promotion No.003 =>for sales on : CustomerType 'F', AllArea, and
ProductGroup 'G' will get discount 3 %
... and any possible combination.
And it is possible for an Order / Invoice to get discount from two or
more different promotion.
e.g: Order 001, get 2 % from Promotion No.001 and 3 % from Promotion
No.003, so totally it gets 5% discount.
(1) Customer Hierarchy
AllCustomer
CustomerGroup
CustomerType
Customer
(2) Area Hierarchy
AllArea
Region
District
Area
(3) Product Hierarchy
AllProduct
ProductGroup
ProductBrand
Product
Our Orders Data has following attributes :
OrderNo.
Customer
Area
Product
Gross
Discount
Additional info :
- Oracle version : 10g
- If multiple discounts are applied, e.g: two discount, 10% each, then
the total discount is 20%, if gross = 100, then netto is 100 * 80% =
80.
The design that comes to my mind is like below, please give me
correcttion and recommendation :
The Promotions is defined in master-detail :
- one master table
- three detail tables (one for each possible hierarchy)
- one additional Tabel to store detail of discount an Order get,
because it can get 2 or more discount.
PromoHeader :
- PromoNumber
- Description
- StartDate
PromoDetail1 :
- PromoNumber
- PType (ALL / CustomerGroup / CustomerType / Customer)
- PCode (ALL / 'xxxx' )
( note : 'xxxx' can be Customer Group Code, Customer Type Code or
Customer Code )
PromoDetail2 :
- PromoNumber
- PType (ALL / Region / District / Area)
- PCode (ALL / 'xxxx' )
( note : 'xxxx' can be Region Code, District Code or Area Code )
PromoDetail3 :
- PromoNumber
- PType (ALL / ProductGroup / ProductBrand / Product)
- PCode (ALL / 'xxxx' )
( note : 'xxxx' can be ProductGroup Code, ProductBrand Code, Product
Code )
PromoByOrder
- OrderNumber
- PromoNumber
- PType
- PCode
- Discount (%)
(if an Order get two discount, there will be two records on this table
for thet order)
The question is :
1) is this a 'good enough' design ?
2) if I do go with this design, how is the efficient query / plsql to
calculate the discounts for an Order.
Pls help..
Thank you very much,
xtanto

Answer 1

How was your wife using the Find My iPhone app from a Samsung phone? But, that question aside, your wife should educate herself on how GPS works, especially on a cell phone. GPS signals can be interfered with by trees, buildings, clouds. Off by several miles would be unusual, though.
If your wife is tracking your cell phone and not believing what you tell her, you may want to consider counseling as there are some very serious issues that go way beyond the technology.
Best of luck.