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Derived horizontal fragmentation:Some applications may include a join of two or more relations. If the relations are stored at dissimilar locations, there may be a major overhead in processing the join. In this type of cases, it may be more appropriate to make sure that the relations or fragments of relations that are joined together are at the similar location. We can get this using derived horizontal fragmentation.
After Reading the basis of concepts relating to distributed database systems, let us outline the process of design of distributed database systems.
Problem: ‘Users and Information system specialists need to spend inordinate amounts of time locating and gathering data' (Watson and Hal, 1998) Recent developments in the ar
What are the objectives of query processing? Ans: The objectives of query processing is to transform a query written in a high level language into a accurate and efficien
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
ER diagram on cosmetics
Question: (a) Discuss the difference between a composite key and a composite attribute. How would each be indicated in an E-R diagram? Support your answer with appropriate exam
Explain the Role of a database administrator a. Defining the Schema The DBA describes the schema which consists of the structure of the data in the application. The DBA
Design an EER schema for the following application and translate the EER schema into relational schemas (and constraints). It is possible that some requirements cannot be captured
What are the different approaches for database design? There are two basic approaches for database design which are as follows: Attribute driven: It compiles a list of att
a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho
What is Data Storage? The storage structures and access methods used by database system are specified by a set of explanation in a special type of DDL called data storage-defin
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