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What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
composite attribute
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
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
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
Identify the need and use of data control through problem solving, illustration
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