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Problem:
(a) Briefly explain the ‘Hierarchical Database Model' using appropriate diagram.
(b) List and briefly describe five potential benefits of the database approach compared to conventional file systems.
(c) To address the issue of data independence, the SPARC/ANSI three level architecture was proposed. Compare and contrast the three levels of the model.
(d) Explain briefly the parts of the Relational Model.
please i request for your assistance in developing a case-based online phone repair
#question.what is mapping constraints and types?.
Which product produces the relation that has attributes of R1 and R2 ? Cartesian product produce the relation which has attributes of R1 and R2
A software contract and consultancy firm maintains details of all the various projects in which its employees are currently involved. These details comprise: Employee Numbe
Give an example of operations from the State Actions and Activities. For instance, in bank the activity verify account code and verify password
Define the terms i) Entity set ii) Relationship set Entity set: The set of all entities of the similar type is termed as an entity set. Relationship set: The set of all rela
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
What are uncommitted modifications? The immediate-modification technique permits database modifications to be output to the database whereas the transaction is still in the act
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
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