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Problem
1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples
2 Explain the following performance tuning techniques
3 What is repository? How is it helpful to the data warehouse maintenance?
4 Explain the following strategies for Data Warehouse testing
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Give the reasons for allowing concurrency? The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long
What are the key features of Oracle? Key features of Oracle are as follows: • Read Consistency • Concurrency • Locking Mechanisms • Quiesce Database • RAC • Portability
the of super market system done in database
Ask question #MinimThe Georgia Tech Library (GTL) has approximately 16,000 members, 100,000 titles, and 250,000 volumes (an average of 2.5 copies per book). About 10 percent of the
I am doing research in this area, especially in sime join and join efficacy when several relations have been queried. Relations located in different sites. I need something like n
Determine the Strong and Weak Entity Based on the method of foreign key, there might be arise a situation when we have to relate an entity having a primary key of its own and a
Define the Division Operation of Relational Algebra Let R be a relation comprising attributes (A1,...Ap,Ap+1,...An) and S comprising attributes (Ap+1,...An) DEF: Division
Spanned and unspanned organisation? Spanned and unspanned organization: If records are not permited to cross block boundaries then the organisation is called unspanned record
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
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