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Illustrate the collaboration and relationship diagram
A collaboration is the society of interfaces, classes and other elements which work together to provide some cooperative behaviour which is bigger than the sum of its parts.
A relationship is a connection between things. In object models, common types of relationships are dependency, inheritance, containment, aggregation, association, generalisation and realisation. The notation for relationship among use cases is shown as:
Figure: Relationship between different use cases
Creating views with Replace option : This option is used to alter the definition of the view without recreating and dropping it or regranting object privileges previously granted o
Given the following set of functional dependencies {cf→ bg, g → d, cdg → f, b → de, d → c} defined on R(b,c,d,e,f,g) a. Is cf→ e implied by the FDs? b. Is dg a superkey?
An entity set that does not have sufficient attributes to form a primary key is called? An entity set that doesn't have sufficient attribute to form a primary key is known as w
Illustrate the State model for the ATM class let us take state model for the ATM class given below in Figure showing state model of the ATM class and the pseudo code derived fr
Question: This form represents one of a number used for each sailing of a range of boats. A passenger may go on many sailings and will have the same passenger number for each.
what is the relationship between receipt and owner entities in computer sales and service company
DISADVANTAGES OF RDBMS
What is use of generating such tables? How can you create temporary tables? When you require a table only for a short time after that you want it to disappear automatically you
Describe integrity and security? a) Domain constraint b) Referential integrity A value that appears in one relation for a given set of attributes also appear fo
Question: (a) What is ODBC and what is its function? (b) What is Web application server, and how does it work from a database perspective? (c) What does e-commerce mean
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