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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.
WHAT IS DATABASE TECHNOLOGIES
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
What are the drawbacks of File Oriented System in details?
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
Discuss the types of integrity constraints in which must be checked for the update operations - Insert and Delete. Give examples. Insert operation can violet any of the subse
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
what are the type of the database
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