Schemas and its types in Cognos

  • Share this blog:

Schemas and its types :


A schema is nothing but a collection of objects

  • Designing a dWH is nothing but designing the schema
  • A data ware house tables are contain dimensional tables and fact tables
  • Database models follows dimensional modeling to design dWH schema
  • Dimensional modeling is a process of creating dimensional tables and fact tables with proper relation

Types of schemas:

  1. Star schema
  2. Snow flake schema
  3. Galaxy schema (or)integrated schema (or) constellation schema


A star schema design is a data base design where the centrally located table is called fact table with surrounded by number of dimensional tables

  • Since the database design looks like star, it is called star schema

Format of star schema:


Dimensional tables:

  • A dimensional table contains detail information (or) descriptive information
  • Dimensions are used to describe the facts.

Fact table: 

  • A fact table contains all the key columns (PK, FK) and measures of the particular business organizations.
  • Measures are also called as facts (or) KPI’s (key performance indications)
  • fact should be a numeric but every numeric near not be a fact.

Sales schema


Learn the core features of Cognos and become master with our expertise tutorials.

Snow flake schema:


Difference between the schema and snow flake schema:

Star schema Snow flake schema
It is de normalizedRetrieval up data is faster redundancy is there  it is normalizedRetrieval up data is slower due to more number of icons redundancy can be reduced

Integrated schema:


For indepth understanding Cognos Training click on

You liked the article?

Like : 0

Vote for difficulty

Current difficulty (Avg): Medium

Recommended Courses


About Author
Author Bio

TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills in the market.