Consider the ER diagram shown below for part of an Inventory System database. LotNumber CreateDate serial exactWeight Cost-Of-Materials Production ProductType Lot Includes Units for quality Test? ProductDesc Created From Units type material-ID Raw Materials UnitCost Answer the following Question based on the above given Er-Diagram a) Identify an attribute in the above ER diagram that might represent a composite attribute, and explain why/how it might represent a composite attribute. b) Identify an attribute in the ER diagram that could represent a derived attribute and explain why/how it might represent a derived attribute c) The ER diagram contains several instances of data redundancy. Please identify one instance where a data redundancy issue exists. d) The ER diagram has the following relationship, "raw materials are used in 0 to many lots." Please explain, in the context of the manufacturing environment, how the meaning changed if the minimal cardinality is changed to “l". 00

Consider the ER diagram shown below for part of an Inventory System database. LotNumber CreateDate serial exactWeight Cost-Of-Materials Production ProductType Lot Includes Units for quality Test? ProductDesc Created From Units type material-ID Raw Materials UnitCost Answer the following Question based on the above given Er-Diagram a) Identify an attribute in the above ER diagram that might represent a composite attribute, and explain why/how it might represent a composite attribute. b) Identify an attribute in the ER diagram that could represent a derived attribute and explain why/how it might represent a derived attribute c) The ER diagram contains several instances of data redundancy. Please identify one instance where a data redundancy issue exists. d) The ER diagram has the following relationship, "raw materials are used in 0 to many lots." Please explain, in the context of the manufacturing environment, how the meaning changed if the minimal cardinality is changed to “l". 00

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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Question

Consider the ER diagram shown below for part of an Inventory System database.
LotNumber
CreateDate
serial-#
exactWeight
Cost-Of-Materials
Production
ProductType
Lot
Includes
Units
ProductDesc
qualityTest?
Created From
Units
type
Raw
material-ID
Materials
UnitCost
Answer the following Question based on the above given Er-Diagram
a) Identify an attribute in the above ER diagram that might represent a composite attribute,
and explain why/how it might represent a composite attribute.
b) Identify an attribute in the ER diagram that could represent a derived attribute and explain
why/how it might represent a derived attribute
c) The ER diagram contains several instances of data redundancy. Please identify one
instance where a data redundancy issue exists.
d) The ER diagram has the following relationship, “raw materials are used in 0 to many
lots." Please explain, in the context of the manufacturing environment, how the meaning
changed if the minimal cardinality is changed to "l".

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