Snowflake schema

1. Differentiate between slowly and rapidly changing dimensions.

2. What are aggregate fact tables? Why are they needed? Give an example.

3. Describe with examples snapshot and transaction fact tables. How are they related?

1. Give an example of a value circle. Explain how a family of STARS can support a value circle.

2. What is meant by conforming the dimension? Why is this important in a data warehouse?

3. For a manufacturing company, design a family of three STARS to support the value chain.

1. Can you treat rapidly changing dimensions in the same way as type 2 slowly changing dimensions? Discuss.

2. How does a snowflake schema differ from a STAR schema? Name two advantages and two disadvantages of the snowflake schema.

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