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Databases

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Transcript

  • 1. DATABASES
    • General database Concepts
    • Application Areas of databases
    • PRESENTED BY :-
    • Anila , Nazrine , & Habeeba
  • 2. Databases
    • Database are the systems that contain different objects used together to facilitate fast and efficient access to data.
  • 3. Data Warehouse The Data Warehouse is a system for storing and delivering massive quantities of data. It is a centralized data repository that stores and provides already transformed and summarized data, therefore, making it an appropriate environment for more efficient DSS and EIS applications.
  • 4.
    • Metadata is data about data. The information that describes the model and definition of the source data elements.
    • Data Dictionary is a data about data and database structures i.e. Metadata.
    • Data mining refers to the extraction of hidden predictive information patterns from large database
  • 5.
    • An Objec t is and identifiable entity with some characteristics and behaviors.
    • A Class represents a group of objects that share common properties and relationships
    • ABSTRACTION refers to the act of representing essential features without including the background details and explaination.
  • 6.
    • Encapsulation :- the wrapping up of data and functions (that operate on the data ) into a single (called class)
    • The Object Modeling refers to building models and performing activities to deploy a good object oriented system.
  • 7.
    • UML stands for Unified Modeling Language which is an open and industry standard visual modeling language for object-oriented systems.
    UML
  • 8.
    • The Client Server Computing represents a model requests are made at one end i.e. The client end and the services are provided at another end i.e. The server end.
    • The Client is defined as a requester of services and a server is defined as the provider of the services
    CLIENT SERVER COMPUTING
  • 9. ONE TIER ARCHITECTURE
    • In One Tier architecture where a single machine acts as the client as well as the server.
  • 10. TWO TIER ARCHITECTURE
    • Two tier Computing Model consists of a Client tier and a data base server tier. Processing tasks and application logic are shared between the database server and the client. The clients in a two tier computing model are fat clients, ie where much of the processing power and application logic inside .
  • 11. THREE TIER ARCHITECTURE
    • In Three tier model a middle tier exits between clients and the database server consist of an application server that contains the bulk of application Logic. Clients in this model are thin Clients.

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