primary key, Database Management System

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what is primary key

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Security-drawbacks of data distribution, Security: In a centralised system...

Security: In a centralised system, access to the data can be simply controlled. Though, in a distributed DBMS not only does access to replicated data have to be controlled in many

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What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many

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What is a database graph? The partial ordering implies that the set D may now be viewed as a directed acyclic graph, known as a database graph.

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Saving Derived Attributes to Avoid Re-computation   As discussed, "redundancy means duplication of exact data". But, if multiple copies of same data are present in the system,

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