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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
What is OMR? OMR (Optical Mark Recognition) is the translation of marks - or the absence of marks - but not the shape of the mark on forms that have small circles ("also called
Define Signal. It allows methods to respond to events triggered by themselves or by other processes. Each signal corresponds to an exacting event. A signal is represented in Sy
Locks: Serialisabilty is just a test whether a given interleaved schedule is ok or has a concurrency related trouble. Though, it does not make sure that the interleaved concurrent
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
what is lossless & dependency preserving decomposition ?
What are the requirements to ensure the objectives of file management principle is realized?
What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec
what is cascading? what is rollback cascading? please explain in detail
explain equi-join using illustration
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
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