Kinds of OLAP
-
Upload
willow-roy -
Category
Documents
-
view
24 -
download
0
description
Transcript of Kinds of OLAP
![Page 1: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/1.jpg)
Online analytical processing (OLAP) is a category of software technology that enables analysts, managers, and executives to gain insight into data through fast, consistent, interactive access to a wide variety of possible views of information that has been transformed from raw data to reflect the real dimensionality of the enterprise as understood by the user.
![Page 2: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/2.jpg)
Kinds of OLAP
ROLAP- relational OLAP using relational databases; a star schema is used
MOLAP- multidimensional OLAP using multidimensional databases
DOLAP- desktop OLAP Other variations
![Page 3: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/3.jpg)
Example: Olap Usage of an Automobile Marketer
The StoryAn automobile marketer wants to improve business activity. Therefore he wants to view sales figures from different perspectives.
A QuestionWhat is the trend in sales volumes over a period of time for a specific model and color across a specific group of dealerships ?
The Data NeedsSales by model
Sales by dealership
Sales by color
Sales over time
etc.
![Page 4: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/4.jpg)
Example: The Multidimensional View of the Data
Sales Volumes
Blue Red White
Van
Coupe
Sedan
Miller
Clyde
Smith
COLOR
DEALERSHIP
MOD E L
![Page 5: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/5.jpg)
OLAP Features: “Slicing and Dicing“ the Data
Sales Volumes
Blue
Red White
Van
Coupe
Sedan
Miller
Clyde
Smith
COLOR
DEALERSHIP
MOD E L
• Color: Blue and White• Model: Coupe only• Dealership: Clyde only
Clyde
Blue
White
Coupe
“Sliced and Diced“ Data
Choosing a range out of each dimension:
![Page 6: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/6.jpg)
OLAP Features: Rotating the Data
Sales Volumes
Blue Red White
Van
Coupe
Sedan
COLOR
MOD E L
View of the Account Manager
Rotate the data cube by 90°
DEALERSHIP
Sales Volumes
Miller
Smith
Clyde
Van
Coupe
Sedan
MOD E L
View of the Product Manager
Different users will require different views of the multidimensional cube – OLAP allows easy rotation of data
![Page 7: Kinds of OLAP](https://reader035.fdocuments.us/reader035/viewer/2022071807/56812e44550346895d93d2d9/html5/thumbnails/7.jpg)
OLAP Features: Drill-Down and Roll-Up
Data can be disaggregated and aggregated along a dimension according to their natural hierarchy
Drill-Down
Roll-Up
State
Region
Dealership Miller Smith
Clyde Lucas Gleason
Atlanta Athens
Georgia
Sales Volumes by Organization Dimension
- three level hierarchy -