Kinds_structure of DB1

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Chapter 1 Introduction toDatabase and MS Access

2007

DatabaseConcepts

Types ofDatabase

DatabaseStructure

DatabaseDesign


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Types of Database

Manual Data base ElectronicDatabase


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Kinds of ElectronicDatabase

Flat Model Database

Hierarchical Model Database

Network Model Database

Relational Model Database
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Flat Model Database


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In a flat model database, there are twodimensional (flat structure) arrays of data.

For instance, there is one column ofinformation and within this column it isassumed that each data item will be related

to the other.


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Hierarchical Model Database


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The hierarchical model database resembles a

tree like structure, such as howMicrosoft Windows organizes folders and files.In a hierarchical model database, each upward

link is nested in order to keep data organized ina particular order on a same level list. Forinstance, a hierarchal database of sales, maylist each days sales as a separate file. Within

this nested file are all of the sales (same typesof data) for the day.
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In a network model, the definingfeature is that a record is stored with a

link to other records in effectnetworked. These networks (orsometimes referred to as pointers) canbe a variety of different types ofinformation.


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The relational model is the most populartype of database and an extremelypowerful tool, not only to store information,

but to access it as well. Relationaldatabases are organized as tables. Thebeauty of a table is that the informationcan be accessed or added without

reorganizing the tables. A table can havemany records and each record can havemany fields.


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Database Structure

Table name Fieldname

Record

F

IELD

Navigation bar


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DataDefinition

DataRefinement

EstablishingRelationship Between

Tables

DeterminingAppropriate

DataOutputs

Creation ofthe Control

System

Gathernecessaryfields for thedatabase.

Fields mighthave to bebroken downto even more

specific fields.

Analyze thetables moreclosely andthink of howrelationshipbetween

tables can beestablish

Informationwill beextractedfrom thedatabase

Program theoperationsystem that

will store,sort, change,

Phases of DBDesign


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Integration

Picture-talk Activity: Create a PowerPointpresentation (using pictures) that will clearlyexplain the processes involved in DBMS as givenby the examples in your book.


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Integration

Create a PowerPoint presentation (using pictures)that will clearly explain the processes involved inDatabase Design


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How is data organized at home, in theoffice or in school for the past few yearsand compare it to the present times; is

there any difference?


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Kinds_structure of DB1

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