Describe benefits and drawbacks of a source-driven architecture for gathering of data at a data-warehouse, as compared to a destination-driven architecture.
Answer to relevant QuestionsConsider the schema depicted in as shown below. Give an SQL: 1999 query to summarize sales numbers and price by store and date, along with the hierarchies on store anddate.Will functional dependencies be preserved if a relation is converted to a temporal relation by adding a time attribute? How is the problem handled in a temporal database?Describe how the ideas behind the RAID organization (Section 11.3) can be used in a broadcast-data environment, where there may occasionally be noise that prevents reception of part of the data being transmitted.If the entire database fits in main memory, do we still need a database system to manage the data? Explain your answer.Consider a multidatabase system in which it is guaranteed that at most one global transaction is active at any time, and every local site ensures local serializability.a. Suggest ways in which the multidatabase system can ...
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