Explain differences between star and snowflake schemas?
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Store (and count) non-fact records?
What are universe requirements?
How many clustered indexes can you create for a table in dwh? In case of truncate and delete command what happens to table, which has unique id.
what is the difference between etl tool and olap tools
Explain what are the advantages data mining over traditional approaches?
what are different types of partitioning in oracle ?
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What is multi-dimensional analysis?
2.What is staging area ?
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Explain about core dimension, balanced dimension, and dirty dimension?
What are different stages of ?Data mining??
Where we use surrogate key explain with example?