Explain ddl (data definition language)?
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what is the difference between DSS and ODS ?
Why null values are mapped as 0 in fact tables?
how much memory space occupied real time project (roughly)?
5.Explain ODS ?
How much data hold in one universe.
What are the difference between snow flake and star schema? What are situations where snow flake schema is better than star schema to use and when the oppositeis true?
What is MDX?
What are partition points?
Explain why fact table is in normal form?
What is a staging area? Do we need it? What is the purpose of a staging area?
What are cluster analysis in data warehousing?
What is data warehosuing hierarchy?