DbMs

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DbMs

  1. 1. DBMS Emraan Ahmad Reg no. 520789486 Bsc-it 6 th Sem Sikkim manipal university
  2. 2. Content <ul><li>Objectives </li></ul><ul><li>Introduction of DBMS </li></ul><ul><li>Component of Dbms environment </li></ul><ul><li>Features of Dbms </li></ul><ul><li>Roles in the Database environment </li></ul><ul><li>History of Database system </li></ul><ul><li>Functions of Dbms </li></ul><ul><li>Advantages of Dbms </li></ul><ul><li>Disadvantages of Dbms </li></ul>
  3. 3. Introduction <ul><li>Collection of interrelated data. </li></ul><ul><li>Set of programs to access data. </li></ul><ul><li>Database Applications : </li></ul><ul><ul><li>Banking: all transactions </li></ul></ul><ul><ul><li>Airlines: reservations, schedules </li></ul></ul><ul><ul><li>Universities: registration, grades </li></ul></ul><ul><ul><li>Sales: customers, products, purchases </li></ul></ul><ul><ul><li>Human resources: employee records, salaries, tax deductions </li></ul></ul>DBMS
  4. 4. Components of DBMS Environment 16
  5. 5. Component of Database System
  6. 6. Components of DBMS Environment <ul><li>Hardware </li></ul><ul><ul><li>Can range from a PC to a network of computers. </li></ul></ul><ul><li>Software </li></ul><ul><ul><li>DBMS, operating system, network software (if necessary) and also the application programs. </li></ul></ul><ul><li>Data </li></ul><ul><ul><li>Used by the organization and a description of this data called the schema. </li></ul></ul>17
  7. 7. Components of DBMS Environment <ul><li>Procedures </li></ul><ul><ul><li>Instructions and rules that should be applied to the design and use of the database and DBMS. </li></ul></ul><ul><li>People </li></ul>18
  8. 8. Features of DBMS <ul><li>Accept data input & store </li></ul><ul><li>Multi-user access </li></ul><ul><li>Security </li></ul><ul><li>Query languages (searching, sorting) </li></ul>DBMS
  9. 9. Roles in the Database Environment <ul><li>Data Administrator (DA) </li></ul><ul><li>Database Administrator (DBA) </li></ul><ul><li>Database Designers (Logical and Physical) </li></ul><ul><li>Application Programmers </li></ul><ul><li>End Users (native and sophisticated) </li></ul>19
  10. 10. History of Database Systems <ul><li>First-generation </li></ul><ul><ul><li>Hierarchical and Network </li></ul></ul><ul><li>Second generation </li></ul><ul><ul><li>Relational </li></ul></ul><ul><li>Third generation </li></ul><ul><ul><li>Extended Relational </li></ul></ul><ul><ul><li>Object-Oriented </li></ul></ul>20
  11. 11. <ul><li>Create databases </li></ul><ul><li>Create tables </li></ul><ul><li>Create supporting structures </li></ul><ul><li>Read database data </li></ul><ul><li>Modify database data (insert, update, delete) </li></ul><ul><li>Maintain database structures </li></ul><ul><li>Enforce rules </li></ul><ul><li>Control concurrency </li></ul><ul><li>Provide security </li></ul><ul><li>Perform backup and recovery </li></ul>Functions of DBMS
  12. 12. Advantages of DBMS <ul><li>Control of data redundancy. </li></ul><ul><li>Data consistency </li></ul><ul><li>More information from the same amount of data. </li></ul><ul><li>Sharing of data. </li></ul><ul><li>Improved data integrity. </li></ul><ul><li>Improved security. </li></ul><ul><li>Enforcement of standards. </li></ul><ul><li>Economy of scale. </li></ul>21
  13. 13. Advantages of DBMS <ul><li>Balanced conflicting requirements </li></ul><ul><li>Improved data accessibility and responsiveness </li></ul><ul><li>Increased productivity </li></ul><ul><li>Improved maintenance through data independence </li></ul><ul><li>Increased concurrency </li></ul><ul><li>Improved backup and recovery services </li></ul>22
  14. 14. Disadvantages of DBMS <ul><li>Complexity </li></ul><ul><li>Size </li></ul><ul><li>Cost of DBMS </li></ul><ul><li>Additional hardware costs </li></ul><ul><li>Cost of conversion </li></ul><ul><li>Performance </li></ul><ul><li>Higher impact of a failure </li></ul>23
  15. 15. ORACLE <ul><li>ORACLE is the no.1 RDBMS. </li></ul><ul><li>ORACLE Corporation Ltd. is the name of the company. </li></ul><ul><li>It belongs to backend section & also to the frontend s/w is D2k(Developer 2000), now it is J Developer. </li></ul><ul><li>It is a two Tier Application. </li></ul>

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