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  • INTERVIEW QUESTIONS DATA WAREHOUSING DETAILS
    Question :
    What are aggregations?
    Category Data Warehousing Interview Questions
    Rating (0.7) By 259 users
    Added on 8/26/2009
    Views 1560
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    Answers:

    Aggregations are precalculated numeric data. By calculating and storing the answers to a query before users ask for it, the query processing time can be reduced. This is key in providing fast query performance in OLAP.



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