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7/25/2019 _500c6443fd67cb004c2b33e3e5070043_Course2Module01Lesson3 (1)

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Information Systems Program

Module 1Data Warehouse Concepts and

Architectures

Lesson 3: Motiation and characteristics
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2

Information Systems Program

Lesson !"#ecties

Discuss historical factors

$%plain data &arehouse characteristics

Compare'contrast characteristics for operational

data"ases ersus a data &arehouses
7/25/2019 _500c6443fd67cb004c2b33e3e5070043_Course2Module01Lesson3 (1)

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3

Information Systems Program

Decision Ma(ing )ierarchy

*esole order delays+

schedule employees

Choose suppliers+

forecast sales

Identify ne& mar(ets+

choose store locations

Decision ma(ing hierarchy ,ypical decisions
7/25/2019 _500c6443fd67cb004c2b33e3e5070043_Course2Module01Lesson3 (1)

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4

Information Systems Program

,echnology and Deployment Limitations

Data&arehouse

technologyand

deployments

Performancelimitations

Lac( ofintegration

MissingD-MSfeatures
7/25/2019 _500c6443fd67cb004c2b33e3e5070043_Course2Module01Lesson3 (1)

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5

Information Systems Program

Data Warehouse Characteristics

$ssential part of infrastructure for "usinessintelligence

Logically centrali.ed repository for decision

ma(ing Populated from operational data"ases and e%ternal

data sources

Integrated and transformed data

!ptimi.ed for reporting and periodic integration
7/25/2019 _500c6443fd67cb004c2b33e3e5070043_Course2Module01Lesson3 (1)

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6

Information Systems Program

Comparison of Processing $nironments
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7

Information Systems Program

Data Comparison

Characteristic Operational

Database

Data Warehouse

Currency Current )istorical

Details leel Indiidual Indiidual and summary

!rientation Process Su"#ect

*ecords perre/uest

0e& ,housands

ormali.ationleel

Mostly normali.ed ormali.ation rela%ed

2pdate leel )ighly olatile Mostly refreshed non olatile4

Data model *elational *elational star schemas4 andmultidimensional data cu"es4
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8

Information Systems Program

Schema Comparison

!perational data"ase Data &arehouse
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9

Information Systems Program

Summary

)istorical reasons for data &arehouse

deelopment

5ey characteristics of data &arehouses

Differences "et&een operational data"ases and

data &arehouses

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