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In a data warehouse, what is the key advantage of organizing data using a star schema?

easy📝 Conceptual Q1 of 15
SQL - Database Design and Normalization
In a data warehouse, what is the key advantage of organizing data using a star schema?
ASimplifies complex queries by denormalizing data
BEnsures data is stored in multiple normalized tables
CReduces data redundancy by using many-to-many relationships
DImproves transactional processing speed
Step-by-Step Solution
Solution:

  1. Step 1: Understand star schema structure

    A star schema consists of a central fact table connected to dimension tables, often denormalized.

  2. Step 2: Identify advantage

    Denormalization simplifies queries by reducing the number of joins needed.

  3. Final Answer:

    Simplifies complex queries by denormalizing data -> Option A

  4. Quick Check:

    Denormalization aids query simplicity [OK]
Quick Trick: Star schema denormalizes for simpler queries [OK]
Common Mistakes:
  • Confusing star schema with normalized OLTP schemas
  • Assuming star schema improves transactional speed
  • Thinking star schema increases data redundancy intentionally

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