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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 recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
explain thee diffrent types of data models
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat
What is called as recursive partitioning? The system repeats the splitting of the input unless each partition of the build input fits in the memory. Such partitioning is known
Define and differentiate between ordered indexing and hashing. Ans: Ordered indexing: To gain fast random access to records in a file, we can make of an index structure. Every
What is Structured Query Langauge (SQL)? SQL is a powerful set-oriented language which was formed by IBM research for the databases that adhere to the relational model. It havi
explain cascading rollback
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
Explain weak and strong entity type ? Weak and Strong entity type: An entity set which does not have a primary key is referred to as a weak entity set. The existence of a wea
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