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What is a star schema in data warehousing?

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Question: What is a star schema in data warehousing?

Options:

  1. A type of data normalization
  2. A database design with a central fact table and dimension tables
  3. A method for indexing data
  4. A concurrency control mechanism

Correct Answer: A database design with a central fact table and dimension tables

Solution: 

A star schema is a type of database design that consists of a central fact table surrounded by dimension tables, facilitating easier data retrieval.

What is a star schema in data warehousing?

Practice Questions

Q1
What is a star schema in data warehousing?
  1. A type of data normalization
  2. A database design with a central fact table and dimension tables
  3. A method for indexing data
  4. A concurrency control mechanism

Questions & Step-by-Step Solutions

What is a star schema in data warehousing?
Correct Answer: A star schema is a type of database design that consists of a central fact table surrounded by dimension tables.
  • Step 1: Understand that a star schema is a way to organize data in a database.
  • Step 2: Identify the central part of the star schema, which is called the 'fact table'.
  • Step 3: Know that the fact table contains important numerical data, like sales or profits.
  • Step 4: Recognize that surrounding the fact table are 'dimension tables'.
  • Step 5: Understand that dimension tables provide context to the data in the fact table, like dates, products, or customers.
  • Step 6: Realize that the star schema makes it easier to retrieve and analyze data because of its simple structure.
  • Star Schema – A star schema is a type of database design that consists of a central fact table surrounded by dimension tables, facilitating easier data retrieval.
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