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Explain what is the advantages data mining over traditional approaches?
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Can we take backup when the database is opened?
What is data merging, data cleansing and sampling?
If I have table T1 and table T2 T1 has 250 cols and 10,000 rows T2 has 2 billion rows and 10 cols Which one would be Fact table and which one would be Dimension table and why ?
3 Answers Extech, Principal Finance,
Explain what are snapshots? What are materialized views & where do we use them? What is a materialized view log?
Explain what are the various transformation available?
What is junk dimension? What is the difference between junk dimension and degenerated dimension?
What are cluster analysis in data warehousing?
Explain why are oltp database designs not generally a good idea for a data warehouse?
What is staging area?
Explain difference between snow flake and star schema.
Is union transormation is active transformation?
What is the difference between agglomerative and divisive hierarchical clustering?
Teradata 
