What is the main difference between star and snowflake star schema? Which one is better and why?


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More Data Warehouse General Interview Questions

What is the metadata extension?

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Do you always need to copy the data before reporting on it?(Example, real-time & on-demand reporting is a requirement)?

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What are diagrams?

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What is the difference between snowflake and star schema? What are situations where snowflake schema is better than star schema when the opposite is true?

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What is static and local variable?

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How to handle time period attribute for time dependent data?? a.)add time period as a part of pk b.)add time period simply and make it nullablec.)add time period simply and make it not null.

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Why denormalization is promoted in universe designing?

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5.Explain ODS ?

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Is there any rownum object from which we can do this?

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Give me a broad concept of what a data warehouse is, and what it might be used for?

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what is the difference between aggregate table and fact table ? how do you load these two tables ?

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