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State about the Use Case Diagram
A use case diagram represents a set of use cases, actors and their relationships. These diagrams shall be used to model context or requirement of a system. It consists of use cases, actors, generalization, dependency, relationship, association, constraints, roles, packages and instances. The use case diagram makes systems, subsystems, and classes accessible by presenting an outside view of how elements may be used in context. The notation for use cases and relationship between use cases, base cases and extend cases is shown as:
Figure: Relationship among use cases
Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further
Consider the ER schema below for the MoneyMaking supermarket chain problem. Translate the given ER schema into SQL CREATE TABLE statement.
explain normalization,and give the examples 1NF,2NF,3NF,BCNF.AND FUNCTIONAL DEPANDENACY AND DECOMPOSITION TECHNIQUES.
For each m:n relationship type R, we make a new table (say S) to represent R. We also contain the primary key attributes of both the participating entity types as a foreign key att
Define Network DBMS The NDBMS is built primarily on a one-to-many relationship, but where a parent-child representation between the data items cannot be ensured. This may occur
Forward Recovery (Redo): In this system the committed changes made by a transaction are reapplied to a previous copy of the database. In simpler
Write short note on Events Events consist of inputs, interrupts, decisions and actions performed by any external device or users. Every event always has a sender and receiver.
For your chosen project, you need to identify the current problem that you wish your project to solve. Produce a Problem Statement. The Problem Statement should explain the purpo
How to draw an ER diagram to a finance companz
What is conceptual model ? A conceptual model is a independent of both hardware and software.
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