Task 3 Consider the following un-normalized relational schema holding information about a shopping basket submitted by a customer. shopping Basket(custNum, custName, custAddress, custContact, ordNum, ordDate, ordLineNum, itemDesc, quantity, totItemPrice, deliveryPerson, delivery Person Contact, expected Delivery Date, creditCardNum, totOrdPrice) In an online application, a customer may submit many orders online. Each order may contain multiple items. Once the orders are confirmed, checked out, and payment made, respective items in the orders are then assigned to delivery personnel to deliver to the customers. Customer can make the payment with any of his/her credit cards. The attributes of the relational schema shopping Basket satisfy the following properties: custNum → custName, custAddress, custContact ordNum → ordDate, totOrdPrice deliveryPerson → deliveryPersonContact ordNum, ordLine Num → itemDesc, quantity, totItemPrice ordNum, ordLineNum, custNum → delivery Person, expected DeliveryDate custNum ordNum → credit CardNum
Task 3 Consider the following un-normalized relational schema holding information about a shopping basket submitted by a customer. shopping Basket(custNum, custName, custAddress, custContact, ordNum, ordDate, ordLineNum, itemDesc, quantity, totItemPrice, deliveryPerson, delivery Person Contact, expected Delivery Date, creditCardNum, totOrdPrice) In an online application, a customer may submit many orders online. Each order may contain multiple items. Once the orders are confirmed, checked out, and payment made, respective items in the orders are then assigned to delivery personnel to deliver to the customers. Customer can make the payment with any of his/her credit cards. The attributes of the relational schema shopping Basket satisfy the following properties: custNum → custName, custAddress, custContact ordNum → ordDate, totOrdPrice deliveryPerson → deliveryPersonContact ordNum, ordLine Num → itemDesc, quantity, totItemPrice ordNum, ordLineNum, custNum → delivery Person, expected DeliveryDate custNum ordNum → credit CardNum
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Transcribed Image Text:Task 3
Consider the following un-normalized relational schema holding information about
a shopping basket submitted by a customer.
shopping Basket(custNum, custName, custAddress, custContact, ordNum,
ordDate, ordLineNum, itemDesc, quantity, totItemPrice, deliveryPerson,
delivery Person Contact, expected Delivery Date, creditCardNum, totOrdPrice)
In an online application, a customer may submit many orders online. Each order
may contain multiple items. Once the orders are confirmed, checked out, and
payment made, respective items in the orders are then assigned to delivery
personnel to deliver to the customers. Customer can make the payment with any
of his/her credit cards.
The attributes of the relational schema shopping Basket satisfy the following
properties:
custNum → custName, custAddress, custContact
ordNum → ordDate, totOrdPrice
deliveryPerson → deliveryPersonContact
ordNum, ordLine Num → itemDesc, quantity, totItemPrice
ordNum, ordLine Num, custNum → delivery Person, expected DeliveryDate
custNum, ordNum → credit CardNum
creditCardNum → custNum
i.
ii.
iii.
Find all minimal-super-keys in the relational schema shopping Basket. List
the derivations of all minimal keys.
Find the highest normal form the relational schema shopping Basket. Provide
justification for your answer.
Decompose the relational schema shopping Basket into a minimal number of
relational schemas in BCNF. List all relational schemas obtained from the
decompositions.
Deliverables
Submit a pdf file consisting of the normalization process and explanation of the
processes of the above relational tables. Name your pdf file as solution3.pdf.
Expert Solution
Minimal superkey
It is also referred as candidate key. It refers to the minimal set of attributes whose value can uniquely identify a record from the given relation.
(i)
In the given shoppingBasket schema, the attributes {custNum,ordNum,ordLineNum} can be used to uniquely identify the records in the table. Therefore, it is the minimal super key or candidate key.
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