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, item Desc, quantity, totItemPrice, delivery Person, 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: i. custNum → custName, custAddress, custContact ordNum → ordDate, totOrdPrice delivery Person → deliveryPersonContact ordNum, ordLineNum → itemDesc, quantity, totItemPrice ordNum, ordLineNum, custNum → delivery Person, expectedDeliveryDate custNum, ordNum → credit Card Num credit CardNum → custNum 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.
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, item Desc, quantity, totItemPrice, delivery Person, 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: i. custNum → custName, custAddress, custContact ordNum → ordDate, totOrdPrice delivery Person → deliveryPersonContact ordNum, ordLineNum → itemDesc, quantity, totItemPrice ordNum, ordLineNum, custNum → delivery Person, expectedDeliveryDate custNum, ordNum → credit Card Num credit CardNum → custNum 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.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text: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, item Desc, quantity, totItemPrice, delivery Person,
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:
●
●
deliveryPerson → deliveryPersonContact
ordNum, ordLineNum → itemDesc, quantity, totItemPrice
ordNum, ordLineNum, custNum → deliveryPerson, expectedDeliveryDate
● custNum, ordNum → credit CardNum
● credit CardNum → custNum
●
●
i.
ii.
custNum → custName, custAddress, custContact
ordNum → ordDate, totOrdPrice
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.
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