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Database presentaion

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M
MD Shahidul Islam

This document provides an overview of database management systems (DBMS). It defines what a DBMS is, its main components, and what it is used for. A DBMS is software that allows users to create, access, and manage a database. It discusses what data and information are, examples of databases, data models and schemas, database languages, architectures, examples of popular DBMS software, and applications of DBMS.

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Md. Shahidul islam ID: 163015024 Department of Computer Science & Engineering Database Management System 1
Contents • Introduction • What is Data ? • What is Information? • Database • Data Models, Schema and Instances • Database Languages • Database System Architectures • Examples of DBMS • Applications of DBMS 2
Introduction • DBMS is a software system for creating, organizing and managing the database. • It provides an environment to the user to perform operations on the database for creation, insertion, deletion, updating and retrieval of data. • DBMS stands for Database Management System. 3
What is Data ? • A collection of raw facts and figures. • Data can be represented in the form of numbers and words which can be stored in computer‟s language. 4
What is Information? • Systematic and meaningful form of data. • Information helps human beings in their decision making. 5
Database • A repository of logically related and similar data. • An organized collection of related information so that it can easily be accessed, managed and updated. Dictionary Airline Database Student Database Library Railways Timetable 6
Data Models, Schema and Instances  Data Models: -Describes structure of the database. -Aim is to support the development of information systems by providing the definition and format of data. -If the same data structures are used to store and access data then different applications can share data. -Classification: 1. High-Level Model 2. Representation Model 3. Low-Level Model 7
Components of Database System • Components of database: Users Software Hardware Data • Users- People who interact with the database: - Application Programmers. - End Users. - Data Administrators. • Software- Lies between the stored data and the users: - DBMS. - Application Software. - User Interface. 8
Database Languages • Once data is filled, manipulation is required (insertion, deletion, modification of data) • For these, a set of languages is provided by DBMS: 1. Data Definition Language. 2. Data Manipulation Language. 3. Data Control Language. 9
Database System Architectures • The journey from big mainframe to pc has also evolved the database and its architecture. • Classification: 1. Centralized DBMS Architecture 2. Client-Server Architecture 3. Distributed Databases 10
Examples of DBMS • Some of the common used DBMSs are: -Oracle, IBM‟s DB2, Microsoft‟s SQL Server, MS-Access and Informix. • Some of the desktop based DBMSs are: -Microsoft FoxPro, Borland dBase and Microsoft Access. 11
Applications of DBMS • Airlines and Railways: Online databases for reservation, and displaying the schedule information. • Banking: Customer inquiry, accounts, loans, and other transactions. • Education: Course registration, result, and other information. • Telecommunications: Communication network, telephone numbers, record of calls, etc. • E-commerce: Business activity such as online shopping, booking of holiday package, etc. • Human resources: Organizations use databases for storing information about their employees, salaries, benefits, taxes, and for generating salary checks. 12
Thank You! 13

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Database presentaion

  • 1. Md. Shahidul islam ID: 163015024 Department of Computer Science & Engineering Database Management System 1
  • 2. Contents • Introduction • What is Data ? • What is Information? • Database • Data Models, Schema and Instances • Database Languages • Database System Architectures • Examples of DBMS • Applications of DBMS 2
  • 3. Introduction • DBMS is a software system for creating, organizing and managing the database. • It provides an environment to the user to perform operations on the database for creation, insertion, deletion, updating and retrieval of data. • DBMS stands for Database Management System. 3
  • 4. What is Data ? • A collection of raw facts and figures. • Data can be represented in the form of numbers and words which can be stored in computer‟s language. 4
  • 5. What is Information? • Systematic and meaningful form of data. • Information helps human beings in their decision making. 5
  • 6. Database • A repository of logically related and similar data. • An organized collection of related information so that it can easily be accessed, managed and updated. Dictionary Airline Database Student Database Library Railways Timetable 6
  • 7. Data Models, Schema and Instances  Data Models: -Describes structure of the database. -Aim is to support the development of information systems by providing the definition and format of data. -If the same data structures are used to store and access data then different applications can share data. -Classification: 1. High-Level Model 2. Representation Model 3. Low-Level Model 7
  • 8. Components of Database System • Components of database: Users Software Hardware Data • Users- People who interact with the database: - Application Programmers. - End Users. - Data Administrators. • Software- Lies between the stored data and the users: - DBMS. - Application Software. - User Interface. 8
  • 9. Database Languages • Once data is filled, manipulation is required (insertion, deletion, modification of data) • For these, a set of languages is provided by DBMS: 1. Data Definition Language. 2. Data Manipulation Language. 3. Data Control Language. 9
  • 10. Database System Architectures • The journey from big mainframe to pc has also evolved the database and its architecture. • Classification: 1. Centralized DBMS Architecture 2. Client-Server Architecture 3. Distributed Databases 10
  • 11. Examples of DBMS • Some of the common used DBMSs are: -Oracle, IBM‟s DB2, Microsoft‟s SQL Server, MS-Access and Informix. • Some of the desktop based DBMSs are: -Microsoft FoxPro, Borland dBase and Microsoft Access. 11
  • 12. Applications of DBMS • Airlines and Railways: Online databases for reservation, and displaying the schedule information. • Banking: Customer inquiry, accounts, loans, and other transactions. • Education: Course registration, result, and other information. • Telecommunications: Communication network, telephone numbers, record of calls, etc. • E-commerce: Business activity such as online shopping, booking of holiday package, etc. • Human resources: Organizations use databases for storing information about their employees, salaries, benefits, taxes, and for generating salary checks. 12