Answer Posted / guest
To design any OLAP model, first we need to understand what
OLAP system we are designing.
We have 2 models for Understanding and implementing project.
E-R Model - which is logical helps us understand components.
Dimension Model - which is practical helps us design OLAP
system.
E-R Model helps us to analyse various Entities related to
the project we are about to design and relation between
them. Its more of a rough sketch using pen and paper or
mind map.
Let me give you an example by taking a College system for
an instance
Entities to be considered for designing college may be -
Administration (Principals, HODS)
Transportation (of course College provides Transportation)
Teaching faculty
Non-Teaching (workers, peons)
Canteen and Stationary
Hostels ( in case of Residential Colleges)
Accounts
.... goes on..
We just understand various components related to the
college database construction and identify the relation
between college and them.
Once E-R model is done and we are clear with the components
involving in database design, we go with Dimensional model.
Analytic Workspace Manager is the primary tool for
creating, developing, and managing dimensional objects in
Oracle Database. Using this tool, we actually design the
data for the
This deals with creating Database with Facts and
Dimensions, Tables for each component.
- Design Dimensions for each component.
- Analyse what type of schema would suit your purpose
whether star/snowflake model.
- Analyse primary key/ foreign key relationships in these
dimensions.
- Creation of Dimensions, Cubes to load data into them.
- Once Cubes are Created , we go for multi dimensional
analysis on them to detail levels and hierarchies.
and save changes in the AWM.
There are various additional components to be designed.
Please find it in the below link
http://docs.oracle.com/cd/B28359_01/olap.111/b28124/cubes.ht
m
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What are the stages that are required in data warehousing?
What is loop in data warehousing?
What are the key features of chameleon that separates it from other algorithms?
Explain what are the mapping paramaters and maping variables?
What is surrogate key? Where we use it?
How would you write a simple stored procedure in tsql which takes a movie_id and returns all the directors associated with it?
What is the difference between data warehouse and operational systems?
What is the difference between snowflake and star schema?
What is meant by metadata in context of a data warehouse and how it is important?
Explain what are necessary tasks to install reportnet software?
What are the different types of data warehousing?
How can you implement many relations in star schema model?
Explain what are the methodologies of data warehousing?
What is the difference between ods and oltp?
What are the different types of scd's used in data warehousing?
