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Advantages And Drawbacks Of Ddbms
There are various reasons for building distributed database systems, with sharing of data, reliability and availability, and speedup of query processing. Though, along with these advantages come various drawbacks, including software development cost, greater potential for increased processing overheads, and bugs.
write on the various type of relationalkey
Describe the capabilities offered via MySQL client APIs? . • Checking for errors. . • Connecting to the MySQL server, selecting a database, disconnecting from the server
What is meant by buffer blocks and disk buffer The blocks residing temporarily in main memory are referred to as buffer blocks. The area of memory where blocks reside t
Serialisability: Any schedule that makes the similar results as a serial schedule is known as a serialisable schedule. But how can a schedule are determined to be serialisable or n
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
Deletion Anomalies: Loss of important Information: In some cases, useful information may be lost when a tuple is deleted. For instance, if we delete the tuple corresponding to stu
What are the failures of Controlling Events Between Objects Failure Unintentional termination of system. Several possible causes: failure of system hardware, o
What are the types of storage devices? Primary storage Secondary storage Tertiary storage Volatile storage Nonvolatile storage
What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each. Ans: Completeness Constraints
explain the level architectures of the database management system
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