Experiencing MIS 10th by m kronenke chapter 05

Example of a Student ReportFigure 5-11 Example of a Student Report Q5-4 How do database applications make databases more useful?... Query ExampleQ5-4 How do database applications make da

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“We Don’t Have a Way to Track the Data About the Videos.”

digital video files in separate directories for each client.

was stolen means searching hundreds of video

files

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Study Questions

Q5-1 What is the purpose of a database?

Q5-2 What is a database?

Q5-3 What is a database management system (DBMS)?

Q5-4 How do database applications make databases more

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Why Use A Database?

 Ex: student grades, student emails, student office

visits.

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A List of Student Grades Presented in a

Spreadsheet – Single Theme

Figure 5-1 A List of Student Grades Presented in a Spreadsheet

Source: Microsoft Excel 2016

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Student Data Form for a Database

Application

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Q2 What is a Database?

Figure 5-3 Student Table (also called a file)

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Hierarchy of Data Elements

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Components of a Database

Figure 5-5 Components of a Database

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Example of Relationships Among Rows

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Sample of Access Metadata

Figure 5-7 Sample Metadata (in Access)

Source: Microsoft Access 2016

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Querying Inequality?

Ethics Guide

• Business professional majored in HR, now "expert"

in SQL.

pattern.

and utilitarian perspectives?

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Querying Inequality? (cont’d)

Ethics Guide

trends.

personal responsibility, considering your needs

and those of your family?

employer to you?

 Is that something to add to your criteria for a job

search?

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Slick Analytics

So What?

analysis of cloud-based data into one synergistic

operation.

manual calculations.

analyze the data.

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Slick Analytics (cont’d)

So What?

deposits in its wells.

robust data analysis, and data accessibility.

2020.

cloud services.

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Database Management System (DBMS)

database.

 IBM, Microsoft, Oracle, and others.

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Processing the Database

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Processing the Database (cont’d)

 International standard

MidTerm)

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Adding a New Column to a Table (in Access 2016)

Figure 5-8 Adding a New Column to a Table (in Access)

Source: Microsoft Access 2016

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Administering the Database

permissions, limits for processing.

database applications, remove unwanted data.

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Summary of Database Administration Tasks

Figure 5-9 Summary of Database Administration (DBA) Tasks

Category Database Administration Task Description

Form steering committee

Consists of representatives of all user groups Forum for community-wide discussions and decisions.

Specify requirements Ensure that all appropriate user input is considered Validate data model Check data model for accuracy and completeness.

Evaluate application design

Verify that all necessary forms, reports, queries, and applications are developed Validate design and usability of application components.

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Summary of Database Administration Tasks (cont’d)

Category Database Administration Task Description

Operation

Manage processing rights and responsibilities Determine processing rights/restrictions on each table and column.Manage security Add and delete users and user groups as necessary; ensure that security system works.Track problems and manage

resolution Develop system to record and manage resolution of problems.

Monitor database performance Provide expertise/solutions for performance improvements

Manage DBMS Evaluate new features and functions

Backup and

Recovery

Monitor backup procedures Verify that database backup procedures are followed

Conduct training Ensure that users and operations personnel know and understand recovery procedures.Manage recovery Manage recovery process

Adaptation

Set up request tracking system Develop system to record and prioritize requests for change

Manage configuration change Manage impact of database structure changes on applications and users.

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Forms, Queries, Reports, and Applications

Forms View data; insert new, update existing, delete existing data.

Queries Search using values provided by user.

Reports Structured presentation of data using sorting, grouping, filtering, other operations.

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Users Accessing Databases

Q5-4 How do database applications make databases more useful?

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Example of a Student Report

Figure 5-11 Example of a Student Report

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Query Example

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Browser Forms, Reports, Queries, and

Applications

Figure 5-13 Four Application Programs on a Web Server Computer

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Account Creation Browser Form

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Browser Report

Figure 5-15 Browser Report

Source: Microsoft Corporation

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Graphical Query: User Clicks on Video Icon

to Find All Videos from that Location

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Multiuser Processing Problem

of 2 pedals

2

3 Andrea puts both in shopping baskets, but delays checking out

3

4.Jeffrey puts both

in shopping basket and checks out before Andrea

4

5 Andrea proceeds

to checkout

Someone will be disappointed.

5

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Q5: How Are Data Models Used for

Database Development?

Q5-5 How are data models used for database development?

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Attributes

• Uniquely identifies one entity instance from other instances – Student_ID_Number

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Student Data Model Entities

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Example of Department, Adviser, and

Student Entities and Relationships (cont’d)

Figure 5-19 Example of Department, Adviser, and Student Entities and Relationships

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Sample of Relationships―Version 1

Crow’s Feet

N:M

An Adviser may have many students, and one student may have many advisers

1:N One department may have many advisers, but an adviser may be

in only one department

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A department has many advisors, and an advisor may advise for more than one department

“Crow’s Foot”

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Crow’s-Foot Diagram Version

Maximum cardinality─maximum number of entities in a

relationship Vertical bar on a line means at least one entity

required

Minimum cardinality—minimum number of entities in a

relationship Small oval means entity is optional; relationship

need not have entity of that type.

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Q6: How Is a Data Model Transformed into

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Data Integrity Problems

Q5-6 How is a data model transformed into a database design?

 Incorrect or inconsistent information

 Users lose confidence in information.

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Poorly Designed Employee Table Causes

Data Integrity Problem

Figure 5-23 A Poorly Designed Employee Table

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Two Normalized Tables

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Summary of Normalization

Figure 5-25 Transforming a Data Model into a Database Design

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Representing 1:N Relationships

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Representing an N:M Relationship: Strategy for Foreign Keys

Figure 5-27 Representing an N:M Relationship

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Users’ Role in the Development of

Databases

• Final judges.

 Entities must contain all the data users need to do

their jobs.

 Must accurately reflect their view of the business.

• Take it seriously.

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A Database System At Falcon Security

Q5-7 How can Falcon Security benefit from a database system?

October 2014, shot from 3,000 feet or less?”

each video in a relational database to query with SQL.

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Falcon Security Chooses Option 1

design simple at first.

Q5-7 How can Falcon Security benefit from a database system?

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Database Processing in 2027?

Q5-8 2027?

speeds in relational databases.

databases exist in commerce.

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ACID Transactions

Q5-8 2027?

ACID.

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New Categories of DBMS

Q5-8 2027?

relatively simple data structures,

ACID transaction support

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New Categories of DBMS (cont’d)

Q5-8 2027?

DBMS, but provide ACID support.

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Database Processing in 2027? (cont’d)

Q5-8 2027?

around these new DBMS products.

comes to job interviews.

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Big Data…Losses

Security Guide

powerful Big Data tools.

collect.

functionality and convenience.

databases are exposed.

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Big Data…Losses (cont’d)

confirmed breaches have not occurred.

respondents’ databases.

reporting capabilities.

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Database Engineer

Career Guide

Jacob Case at Overstock.com

Q What attracted you to this field?

A “I still remember my first database class I just had a feeling that it was important because I knew businesses derive information and

critical insights from data, and these insights are used to make critical business decisions I knew that if I became proficient with managing and analyzing data I would always have a job.”

Q What advice would you give to someone who is

considering working in your field?

A “Don't be intimidated by the idea of working in the field of

information systems If you are committed to learning, are teachable,

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Active Review

Q5-4 How do database applications make databases more

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Dean's Piano Database

Case Study

technician repairing and

restoring pianos for

many years.

children’s parties.

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Pianos in Storage

Figure 5-31 Pianos in Storage

Source: David Kroenke

Case Study

Figure 5-32 Pianos in TentSource: David Kroenke

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Columns in the Piano Table

Case Study

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Query Design and Result

Figure 5-34 Example Query

Case Study

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Results from Query

Case Study

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Piano Sound Quality by Building

Figure 5-36 Piano Sound Quality by Building

Case Study

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