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.
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