15. Below is a fragment of the entity-relationship diagram. For the relationship shown, identify its relationship, cardinality, and existence. Employee is assigned to Parking Space O a. Relationship: one-to-many Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional O b. Relationship: zero-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee required Oc. Relationship: zero-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional Od. Relationship: one-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional

15. Below is a fragment of the entity-relationship diagram. For the relationship shown, identify its relationship, cardinality, and existence. Employee is assigned to Parking Space O a. Relationship: one-to-many Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional O b. Relationship: zero-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee required Oc. Relationship: zero-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional Od. Relationship: one-to-one Cardinality: zero or one employee per parking space, one or many parking spaces per employee Existence: parking space required, employee optional

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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Fundamentals of Managing Data

Data management is creating, organizing, storing and managing the data collected and created by any organization.Effective data management is a crucial part of today's world. Data management provides analytical information on the vast amount of data collected from business applications daily, which helps make critical business decisions and plan and bring out the best strategies.

Question

15. Below is a fragment of the entity-relationship diagram. For the relationship shown, identify its relationship, cardinality, and existence.
Employee
is assigned to
Parking Space
a.
Relationship: one-to-many
Cardinality: zero or one employee per parking space, one or many parking spaces per employee
Existence: parking space required, employee optional
Ob.
Relationship: zero-to-one
Cardinality: zero or one employee per parking space, one or many parking spaces per employee
Existence: parking space required, employee required
О с.
Relationship: zero-to-one
Cardinality: zero or one employee per parking space, one or many parking spaces per employee
Existence: parking space required, employee optional
Od.
Relationship: one-to-one
Cardinality: zero or one employee per parking space, one or many parking spaces per employee
Existence: parking space required, employee optional

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