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8/31/99Database Management -- Fall R. Larson Terms and Concepts Database: Enterprise Entity Attributes Data values Records File Key Primary Key
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8/31/99 Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information Management and Systems SIMS 257: Database Management
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Page 1: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database Models and Introduction to AccessUniversity of California, Berkeley

School of Information Management and Systems

SIMS 257: Database Management

Page 2: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Last Time

• Database concepts and terminology• Database Life cycle

Page 3: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Terms and Concepts• Database: • Enterprise• Entity• Attributes• Data values• Records• File• Key• Primary Key

Page 4: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Terms and Concepts• Data Independence• Models

– (1) Levels or views of the Database• Conceptual, logical, physical

– (2) DBMS types• Relational, Hierarchic, Network, Object-Oriented, Object-

Relational

• Metadata

Page 5: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Models (1)

ConceptualModel

LogicalModel

External Model

Conceptual requirements

Conceptual requirements

Conceptual requirements

Conceptual requirements

Application 1

Application 1

Application 2 Application 3 Application 4

Application 2

Application 3

Application 4

External Model

External Model

External Model

Internal Model

Page 6: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Terms and Concepts

• Data Dictionary• Data Administration• Database Administration• Data Steward• DA• DBA

Page 7: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database System Life Cycle

Growth,Change, &

Maintenance6

Operations5

Integration4

Design1

Conversion3

PhysicalCreation

2

Page 8: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Today

• Models(2): DBMS types– Hierarchical– Network– Relational– Object-Oriented

Page 9: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database Data Models

• Hierarchical Model– Similar to data structures in programming

languages.Books

(id, title)

Publisher SubjectsAuthors(first, last)

Page 10: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database Data Models

• Network Model– Provides for single entries of data and

navigational “links” through chains of data.

Subjects Books

Authors

Publishers

Page 11: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database Data Models

• Relational Model– Provides a conceptually simple model for data

as relations (typically considered “tables”) with all data visible.

Book ID Title pubid Author id1 Introductio 2 12 The history 4 23 New stuff ab 3 34 Another title 2 45 And yet more 1 5

pubid pubname1 Harper2 Addison3 Oxford4 Que

Authorid Author name1 Smith2 Wynar3 Jones4 Duncan5 Applegate

Subid Subject1 cataloging2 history3 stuff

Book ID Subid1 22 13 34 24 3

Page 12: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Database Data Models

• Object Oriented Data Model– Encapsulates data and operations as “Objects”

Books(id, title)

Publisher SubjectsAuthors(first, last)

Page 13: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Test Database• The DiveShop database contains information for

the business operations of a skin & scuba diving shop that:– Organizes trips to particular locations (destinations) with

various dive sites– Dive sites have various features including

• types of marine life found there• other features (like shipwrecks)

– Rents/Sells equipment to dive customers for particular trips (or to other dive shops)

Page 14: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

ER Diagrams

• We will examine ER diagrams in greater detail later

• ER Diagrams show Entities (rectangles) and their attributes (ovals) and the relationships between entities (diamonds)

Page 15: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Destinationno

Site no

Site Name

SiteNotes

SiteHighlight

DistanceFrom Town (M)

DistanceFrom Town (Km)

Skill Level

Visibility(ft)

Depth (m)

Depth (ft)Sites

Visibility (m)

Page 16: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Name

Customer no

Street

State/ProvCity ZIP/PostalCode

Country

First Contact

PhoneDiveCust

Page 17: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Destinationname

Destination no

Avg Temp (F)

SpringTemp (F)

Avg Temp (C)

Summer Temp (C)

SummerTemp (F)

TravelCost

WinterTemp (C)

FallTemp (F)

FallTemp (C)Dest

WinterTemp (F)

Accommodations

Body ofWater

NightLife

Page 18: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Category

Species no

CommonName

Length(cm)

SpeciesName

Length(in)

Notesexternal

GraphicexternalBioLife

Page 19: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Site no

Ship Name

Category

InterestType Tonnage

Length (ft)

Beam(m)

Beam(ft)

Length(m)Shipwrck

Cause

Commentsexternal

DateSunk

Passengers/Crew

Graphicexternal

Survivors

Condition

Page 20: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

Description

Item No

EquipmentClass

ReorderPoint On Hand Cost

SalePrice

DiveStok

Page 21: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER Entities

CustomerNo

Order no

SaleDate

ShipVia Subtotal

TotalInvoice

DestinationCCExpDate

CCNumber

PaymentMethodDiveOrds

No ofPeople

VacationCost

ReturnDate

DepartDate

Page 22: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER diagram

Item no

Order no

Rental/Sale

Qty Price LineTotal

Line Note

DiveItem

Page 23: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER diagramSpecies

NoSiteNo

BioSite

Page 24: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop ER diagramShip Via

ShipCost

ShipVia

Page 25: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

DiveShop ER DiagramCustomer

No

ShipVia

Dest

Sites

BioSite

ShipVia

ShipWrck

BioLife DiveStok

DiveItem

DiveOrds

DiveCust

CustomerNo

ShipVia

OrderNo

OrderNo

ItemNo

ItemNo

DestinationName

Destination

SpeciesNo

Site No

Destinationno

Site No

Destinationno

SpeciesNo

Site No

1

1

1

1

1

1

1/n

1

1n

n

n

n

n

n

n

n

1

Page 26: 8/31/99Database Management -- Fall 1999 -- R. Larson Database Models and Introduction to Access University of California, Berkeley School of Information.

8/31/99 Database Management -- Fall 1999 -- R. Larson

Diveshop Questions• How many tons was the sunken ship Delaware?• What is customer Karen Ng’s address?• At what site might you find a Spotted Eagle Ray?• Where is the site Palancar Reef?• What sites might Lorraine Vega dive on her trip?• Keith Lucas wants to see a shipwreck on his trip. Is he going

to the right place?• What equipment is Richard Denning getting?• What is the cost of the equipment rental for Louis Jazdzewski


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