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What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c
i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
The aims of the project are: 1. To enable the students to undertake the detailed design of a specific plant or process 2. The design projects includes: process selection; und
explain various steps uses in evaluation and maintenance of MIS.
projects?
Data Fragmentation "Fragmentation includes decomposing the data in relation to non-overlapping component relations". Why do we require fragmenting a relation?
how many hourse have been spent on a certain project
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