Explaining data warehouse
Explain in brief the term data warehouse.
Expert
Data warehouse is defined as a repository of the different heterogeneous data sources that is organized under the unified schema at a single site in order to facilitate the management decision making.
(or)
A data warehouse is defined as the subject-oriented, time-variant and non-volatile collection of the data in support of management’s decision-making procedure.
Describe the difference between a regular sub query and a correlated sub query?
Define the efficient data structure used within the internal storage representation in RDBMS?
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Explain the Scope of Analysis?
Explain the four kinds of indexes?
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