1. DATABASE MANAGEMENT SYSTEM By: YAMINI TRIPATHI

2. INTRODUCTION Consists - Collection of interrelated data - Set of programs to access those data Definition of structure for the storage Manipulation of information Safety information

3. INITIAL STAGES OF DATABASE Records in files and application program DISADVANTAGES: Data redundancy Difficulty in accessing data Data isolation Integrity problems Atomicity problems Concurrent access anomalies Security problems

4. CURRENT STAGE View of data - Physical - Logical - View level Data model - Object based logical model - Record based logical model - Physical models

5. DATABASE LANGUAGES DDL - To specify database schema DML - To express database queries and updates Procedural language Non-procedural language

6. Graphical View of Database Naïve Application Sophisticated DBA programmers Users User Application Interfaces Application Programs Query Database Schema Query Processor Storage Manager DBMS Disk Storage