Bsc CSIT Semester 4 – Database Management System – Unit 2: Database System – Concepts and Architecture (3 Hrs.)

Advantages of Database Management System (DBMS) over Traditional File System A Database Management System (DBMS) is a software system that allows storing, organizing, and managing data efficiently. It

Data Abstraction Data Abstraction in DBMS refers to hiding the internal details of data storage and presenting users with only necessary information. It simplifies database usage by separating data

1. Types of Database Users and Their Roles A DBMS is accessed by different categories of users, each having specific roles and responsibilities. The main types of database users are: a) Database Admi

Data Independence refers to the capability to change the schema at one level of the database without affecting the next higher level. It is of two types: 1. Logical Data Independence - It is the abil

1. Database Management System (DBMS) A Database Management System (DBMS) is a software system that enables users to define, create, maintain, and control access to databases. Key Features: - Stores

1. Schema in DBMS Definition: A schema is the overall structure or design of the database, describing how data is organized and how the relationships among data are associated. It is defined at th

DBMS 4th Sem - Key Concepts 1. Data Abstraction Definition: Data abstraction is the concept of hiding the internal details of how data is stored and maintained, and showing only the essential featu

Data Independence and Three-Schema Architecture 1. Data Independence Definition: Ability to change the schema at one level without affecting the next higher level. Types: - Logical Data Independen

Specialization in DBMS 1. Definition of Specialization Specialization is a top-down process in Entity-Relationship (ER) modeling where a higher-level (superclass) entity is divided into two or more l

ANSI/SPARC Three-Schema Architecture The ANSI/SPARC three-schema architecture is a framework that describes how a Database Management System (DBMS) separates data into three different levels of abstra

Classification of Database Management Systems Based on Data Model Database Management Systems (DBMS) can be classified into different types depending on the data model they use to represent and manage