Dbms 2

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Dbms 2

  1. 2. <ul><li>Operational Databases </li></ul><ul><li>End User Databases </li></ul><ul><li>Centralized Databases </li></ul><ul><li>Distributed Databases </li></ul><ul><li>Personal Databases </li></ul><ul><li>Commercial Databases </li></ul>
  2. 3. <ul><li>Data relating to operations of an enterprise </li></ul><ul><li>Organized on functional lines such as marketing, production etc </li></ul><ul><li>Example - one that is used to take orders and fulfill them. </li></ul><ul><li>It is based on accounts and transactions </li></ul>
  3. 5. <ul><li>These databases consist of data developed by individual end - users . </li></ul><ul><li>Managers at different levels </li></ul><ul><li>Examples of these are collections of documents in spreadsheets, word processing </li></ul>
  4. 6. <ul><li>Concentrate at a single place or area. </li></ul><ul><li>Store entire information and application programs at a central facility </li></ul><ul><li>Example – MTNL has a centralized Database for registration of applications </li></ul>
  5. 8. <ul><li>Contribution from common databases </li></ul><ul><li>stored in multiple computers located in the same physical location, or may be dispersed over a network of interconnected computers. </li></ul>
  6. 10. <ul><li>Subject specific, user designed databases </li></ul><ul><li>Meant for personal use say by a dept </li></ul>
  7. 11. <ul><li>Contain information that external users require but cannot afford to maintain such huge databases </li></ul><ul><li>Subject Specific </li></ul><ul><li>Financial & technical information </li></ul><ul><li>Example - The Spire Project: Commercial Databases </li></ul>
  8. 12. <ul><li>Determine purpose </li></ul><ul><li>Determine tables, fields </li></ul><ul><li>Identify Unique keys </li></ul><ul><li>Determine Relationships between tables </li></ul>
  9. 13. <ul><li>Students </li></ul><ul><ul><li>Social Sec. Num. </li></ul></ul><ul><ul><li>Name (Last, First) </li></ul></ul><ul><ul><li>Matriculation Date </li></ul></ul><ul><li>Departments </li></ul><ul><ul><li>Dept ID </li></ul></ul><ul><ul><li>Dept Name </li></ul></ul><ul><ul><li>Dept Chair Faculty ID </li></ul></ul><ul><ul><li>Dept Room </li></ul></ul><ul><ul><li>Dept Office Phone </li></ul></ul>
  10. 14. <ul><li>Courses </li></ul><ul><ul><li>Dept ID </li></ul></ul><ul><ul><li>Course Number </li></ul></ul><ul><ul><li>Course Name </li></ul></ul><ul><ul><li>Hours </li></ul></ul><ul><li>Classes </li></ul><ul><ul><li>Course Number </li></ul></ul><ul><ul><li>Section </li></ul></ul><ul><ul><li>Year </li></ul></ul><ul><ul><li>semester </li></ul></ul><ul><ul><li>Faculty ID </li></ul></ul><ul><ul><li>Blog </li></ul></ul><ul><ul><li>RoomNum </li></ul></ul>
  11. 15. <ul><li>Grades </li></ul><ul><ul><li>Social Sec. Num. </li></ul></ul><ul><ul><li>Dept ID </li></ul></ul><ul><ul><li>Course Number </li></ul></ul><ul><ul><li>Section </li></ul></ul><ul><ul><li>Year </li></ul></ul><ul><ul><li>Term </li></ul></ul><ul><ul><li>Grade </li></ul></ul>

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