How is the design for this complex requirement ?

Question

Hi All,
I have Customer hierarchy as follow :
CustomerCategory
CustomerType
CustomerGroup
Customer
Discount can be given to a CustomerCategory, or CustomerType, or a CustomerGroup, or a Customer , or to ALL Customer. Discount is defined in a Promotion Table
Customer Table :
CustomerCode
CustomerName
CustomerCategoryCode
CustomerTypeCode
CustomerGroupCode
Order Table :
OrderNo
OrderDate
CustomerCode
OrderGross
Discount
Promotion Table :
PromoNumber
PromoType (ALL / CustomerCategory / CustomerGroup / CustomerType / Customer)
PCode (ALL / 'xxxx' )
Discount
** note :
if PromoType = PCode = 'ALL', means the Discount is given to all customer.
If PromoType = 'CustomerCategory' then PCode = Customer Category Code
If PromoType = 'Customer' then PCode = Customer Code
and so on...
** by doing this I avoid to define discount in four table.
The question is :
1) Is there any better way to define the promotion table
2) If I do design the Promotion table like above, how is the efficient query to find the discount for an Order ??
Thank you for your help,
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.