Data Warehousing

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Date Submitted: 02/09/2015 08:05 PM

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What are the distinguishing characteristics of OLAP and data mining analyses? Compare

 and

 contrast

 OLTP

 and

 OLAP

 queries.

  OLAP(Online

 analytical

 processing)is

 a

 typical

 analytical

 technology,

 which

 means

 

  computer

 processing

 that

 enables

 a

 user

 to

 easily

 and

 selectively

 extract

 and

  view

 data

 from

 different

 points

 of

 view.

 For

 example,

 a

 user

 can

 request

 the

 data

 be

  analyzed

 and

 showed

 in

 a

 spreadsheet

 to

 indicate

 how

 many

 ZARA’s

 hats

 are

 sold

 in

  the

 October

 in

 New

 York.

 Also,

 it

 also

 can

 show

 that

 the

 data

 in

 the

 same

 period

 but

  in

 different

 years.

 Further

 more,

 the

 user

 can

 also

 request

 for

 the

 same

 year’s

 data

  but

 in

 the

 different

 month

 in

 New

 York,

 or

 the

 same

 month

 but

 in

 different

 area

 like

  Chicago.

 OLAP

 data

 is

 stored

 in

 a

 multidimensional

 database

 to

 facilitate

 this

 kind

 of

  analysis.

 Multidimensional

 database

 considers

 each

 data

 attribute

 as

 a

 separate

  dimension.

 For

 example,

 product,

 sales

 quantity,

 area,

 time

 period

 etc.

 ,

 all

 these

  could

 be

 considered

 as

 a

 “dimension”.

 Furthermore,

 attributes

 can

 be

 broken

 into

  sub-­‐attributes.

 OLAP

 software

 can

 locate

 the

 intersection

 of

 dimensions

 and

 display

  them.

 

  Data

 Mining

 is

 also

 a

 typical

 analytical

 technology

 which

 means

 the

 process

 of

 analyzing

  data

 from...