Topic: Distributed DBMs
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Why global query optimization is difficult in distributed dbms?
1:parallel execution 2: Additional communication cost 3: Transparency and replication Read More »
Source: http://wiki.answers.com/Q/Why_global_query_optimization_is_diffic...
Why fragmentation and date replication are useful in Distributed ...
Most people use Relational databases to simplify work. All a Distributed DBMS is a Relational Database spread over a wider area than the workplace. Fragmentation and Date replication are complications and experience says that Distributed DB... Read More »
Source: http://wiki.answers.com/Q/Why_fragmentation_and_date_replication_...
What I need to do is randomly assign a cell code to these members...
By definition, Random numbers are Random. You may call it 10 times and have it return the same value everytime. Read More »
Source: http://www.experts-exchange.com/Database/Oracle/Q_21751718.html
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Distributed DBMs
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Source: http://www.faqs.org/qa/qa-17540.html
A centralized database has all its data at one place so there may occur problems of data avalability and a system crash may lead to whole dataloss. In a distributed database database is stored on several computers and they communicates usin...
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Source: http://www.geekinterview.com/question_details/57883
