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Introduction to IBM COGNOS

Data Base:

It is a collection of inter related data (or) it is a collection of objects


OLTP DATABASE: (original transactional processing)

It is used to perform day to day transaction (or) it is used to load day to day transaction data.


OLAP DATABASE: (online analytical processing)

It is used to perform analysis by maintaining all the historic data



Data ware house tools are categorized into two types

  1. ETL tools
  2. Reporting tools (or) OLAP tools(or) BI tools

ETL tools:

Used to perform extraction transformation and loading

The following are the Etl tools available in the mark etl

  1. Informatica
  2. Data storage
  3. Abinitio
  4. ODI (oracle data integrator)
  5. BODS (business objects data services)
  6. SSIS (sequel server integrator services)

Reporting tools:

  • Used to generate reports to perform analysis
  • The following are the reporting tools
  1. IBM cognos
  2. SAP BO (business objects)
  3. Plicro strategy
  4. OBIEE (oracle business intelligence)
  5. Hyperlan
  6. Qlik view


Fathers of data ware house:

  1. Raiph Kim ball
  2. WH inmon
  • According to Ralph Kimball, a data ware house is also a database specify designs for analysis per pase but not for running the business
  • According in to W.H inmon a data ware house is a time variant, non volatile subject oriented and integrated database


Naming conventions for synonyms for data ware house: 

  1. DSS : decision supporting system
  2. Historical database
  3. OLAP database
  4. BIS (business intelligence system)
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Data ware housing: (imp)  

It is a process of

  • Constructing the data ware house (or) building the data ware house (or) designing the DWH schema (database modeling (or) data base architects.
  • ETL (ETL developers)




Data Acquisition

It is a process of ETL



Architecture of ETL:           




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