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Define an abstraction by which relationships are treated as higher level entities
Ans: Aggregation.
It is an abstraction by which relationships are treated as higher level entities Aggregation. (In ER diagram, aggregation is utilized to denote a relationship as an entity set.)
Client Server Databases- The concept behind the Client/Server systems is simultaneous, cooperative processing. It is an approach that presents a one systems view from a user's vie
Project Description: I want to build a card playing Website. The user should be able to 1. Login. 2. Have profile access. 3. Put money into the site. 4. Selects t
Define garbage collection. Garbage may be formed also as a side effect of crashes. Periodically, it is essential to find all the garbage pages and to add them to the list of fr
Consider a database schema consisting of four relations, whose schemas are: Product (maker, model, type) PC (model, speed, ram, hd, price) Laptop (model, speed, ram, hd, s
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Explain four causes for failures in data warehouse projects
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Define the Division Operation of Relational Algebra Let R be a relation comprising attributes (A1,...Ap,Ap+1,...An) and S comprising attributes (Ap+1,...An) DEF: Division
What are the requirements to ensure the objectives of file management principle is realized?
In object oriented design, which steps must designer take to adjust inheritance? To readjust inheritance following steps should be taken: i) Rearrange and adjust the classe
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