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OBJECTIVES
After going through this unit you should be capable to:
There are two major types of fragmentation: Horizontal& Vertical. Horizontal fragments, as the name suggests are subsets of tuples and vertical fragments are subsets of attributes
Explain Relational model and their use in DBMS? Relational Model - The relational model was first introduced through E.F. Codd of the IBM Research in the year of 1970. The mode
basic structure of xml
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
What is the main difference between read-only and update methods? A read-only method does not affect the values of a variable in an object, whereas an update method may alter t
1. Will you advise that your organization uses open source software and why? 2. Why is it important for business managers to have a basic understanding of the software development
What does Aggregation mean?
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
Performance of Various Concurrency Control Mechanisms
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