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 Introduction to DBMS

Introduction to Database Management System
Content covered: 
  • This lecture is overview of the course Database Management System
  • Suppose, you want to access some website like "" then you make a request through the browser , this request goes to server which has got business logic but no data , so it further requests database server , which responds back by sending data to server , which ultimately responds to user by providing him a webpage.
  • Following topics will be covered in upcoming videos:
  1. Introduction
  2. ER Model
  3. Relational Database Model
  4. Database Design
  5. SQL
  6. Transaction Management
  7. Concurrency Control
  8. File Structure
  9. Index Structure for file
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Lecture on Database & DBMS
Content covered: 
  • In this video we will be discussing about DB (Database) and DBMS (Database Management System).
  • DB is a collection of related data.
  • Data are facts that can be recorded , ex. age of person.
  • Data should have implicit meaning.
  • Data should be related.

Properties of DB:

  • logically coherent collection.
  • some aspects of real world, mini world, representation of real purpose problems.
  • data could range in size from few KBs toTBs and complexity.

What is DBMS?

  • DBMS is a software collection of programs that enables user to create and manage database.
  • DBMS System =Database + DBMS s/w


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Lecture on Database vs Filesystem
Content covered: 

This lecture explains the difference between Database and Filesystem, and discusses about the features of Database.

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Lecture on Data Model
Content covered: 
  • This lecture explains the concept of Data Model.
  • Data Model basically tells about structure, introduces you to abstraction and tells how data is stored and processed in the system.
  • 3 types of Data Model exists:
  1. Hierarchical Model
  2. Network Model
  3. Relational Model

Hierarchical Model:

  • ‚Äčit was first proposed by IBM.
  • it is a tree like structure, one parent may have multiple child but child will have only one parent.
  • one to many relationship exists.

Network Model:

  • it is a graph like structure.
  • child may have multiple parents.
  • m:n relationship exists.

Relational Model:

  • Data is organised in form of 2D tables.
  • Ex. : MySQL, Oracle,..
  • Relationship among table exists.
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Lecture on Schema, Instance & Metadata
Content covered: 
  • This lecture describes the idea of Schema, Instance, and Metadata.


  • ‚ÄčIt is basically description of database.
  • It is specified during database design and is expected not to be changed frequently.

Instance: It is snapshot of Database at a particular point of time, also known as current set of occurence.

Metadata: It is basically data about data.It has complete description of data.

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Lecture on Data Independence
Content covered: 
  • In this lecture the concept of Data Independence has been explained.
  • Data Independence: Capacity of changing some part of schema without affecting entire schema either by deleting old database or creating new database.
  • 3 levels of schema are:
  1. Application Schema: application programs run at this level
  2. Logical/Conceptual Schema: relationship exists
  3. Physical Schema: Storage level
  • Logical Data Independence: Capacity of changing conceptual level /logic without affecting application program
  • Physical Data Independence: Capacity of changing physical schema without affecting logical schema.
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Lecture on Database Abstraction
Content covered: 

This lecture describes the concept of Database Abstraction.

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Lecture on Database Users
Content covered: 
  • This lecture discusses the roles of different Database Users.
  • Different types of database users are:
  1. Naive user: Uses interactive GUI to do work .Ex: filling up form
  2. Application programmer: Writes application programs.
  3. Sophisticated user: can make query directly through the query processor
  4. Specialised User: develops knowledge based system, computer aided design, expert system
  5. Administrative User: he has all the permissions, can create and modify schema, can define access method, can grant permission to other users, can do routine maintenance like clearing of logs,....
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Lecture on Database Architecture
Content covered: 

This lecture explains about Database Architecture.

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  • This quiz contains 5 questions on the topic Introduction to DBMS
  • Learn well before you attempt the quiz
  • You can attempt the quiz unlimited number of times.

Difficulty Level:  basic