Consider the ER diagram shown below for part of an Inventory System database.LotNumberCreateDateserial-exactWeight(Cost-Of-MaterialsProductionProductTypeLotIncludesUnitsquality Test?ProductDescCreated FromUnitstypeRawmaterial-IDMaterialsUnitCostAnswer the following Question based on the above given Er-Diagramb) Identify an attribute in the ER diagram that could represent a derived attribute and explainwhy/how it might represent a derived attribute

Derived attribute is an attribute which can be derived from other attributes.

Answered: b) Identify an attribute in the ER…

b) Identify an attribute in the ER diagram that could represent a derived attribute and explain why/how it might represent a derived attribute

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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Concept explainers

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.

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
quality Test?
ProductDesc
Created From
Units
type
Raw
material-ID
Materials
UnitCost
Answer the following Question based on the above given Er-Diagram
b) Identify an attribute in the ER diagram that could represent a derived attribute and explain
why/how it might represent a derived attribute

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