Cdocumentsandsettingsuser1desktop2 dbmsexamples-091012013049-phpapp01

Introduction Example databases Overview of concepts Why use database systems

Example Databases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example Databases (contd.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The basic Terminology ,[object Object],[object Object],[object Object],[object Object],[object Object]

Client/Server-Architecture Database Database Management System Interpreter for ad-hoc queries End user Clients Server Application Programs Application Programmer Database Administrator

Example DBMS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Who wants to study databases? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],sid name login age gpa 31 Raja raj 22 3.4 34 Rani ran 21 3.3 Students ,[object Object],[object Object]

Data Models (contd.) ,[object Object],[object Object],[object Object]

Example: University Database Students sid name login age gpa Enrolled Courses cid cname credits grade sid name login age gpa cid cname credits sid cid grade Students Enrolled Courses Entity Relationship Relation Relation Relation Entity

Querying Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Storage and Data Access ,[object Object],[object Object],[object Object],[object Object],[object Object],Query Optimization And Execution Relational Operators Files and Access Methods Buffer Management Disk Space Management DB

Transaction Management: Controlling the Database Access ,[object Object],[object Object],[object Object],[object Object]

Transactional Properties ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why use a DBMS? (instead of files) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why use a DBMS? (contd.) (instead of files) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Emphasis of the Course ,[object Object],[object Object],[object Object],[object Object]

Levels of Abstraction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],View 1 View 2 View 3 Conceptual Schema Physical Schema

Example: University Database ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Independence ,[object Object],[object Object],[object Object]

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