produce a list of relations indicating the primary key, columns and foreign keys.
produce a list of relations indicating the primary key, columns and foreign keys.
Consider the following attributes for tables in a relational model
designed to keep track of information for a moving company that
moves residential customers, usually from one home or apartment
to another:
customerID, customerName, customerCurrentAddress,
customerCurrentPhone, customerNewAddress, customerNewPhone,
pickupLocation, dropOffLocation, dateOfMove, startingTime,
estimatedWeight, estimatedCost, truck#Assigned, driverName,
driverLicNo, actualCost, amountOfDamages, truckCapacity,
costOfTolls, tax, finalAmount, invoiceNumber, amountPaid,
datePaid, checkNumber, amountDue
Assume:
- Although in most cases the pickupLocation is the customer’s old
address and the dropOffLocation is the new address, there are
exceptions, such as when furniture is moved to or from storage.
-An estimate is provided before the move using a pre-printed invoice
containing a unique invoice number. The actual cost is recorded
on the same form once the move is complete. The actual cost may
differ from the estimated cost. The final amount includes the actual
cost of the move, plus tax and tolls.
- In most cases, the customer pays the final amount immediately,
but sometimes he or she pays only part of the bill, especially if the
amount of damages is high. In those cases, there is an amount due,
which is the difference between the final amount and the amount
paid
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