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RELATIONAL DATABASE MANAGEMENT SYSTEMS

DESCRIPTION

Let me first thank you for considering this textbook.  Our aim is to present the fundamental concepts in ways that you will find useful right away.

I have worked hard to create a product that is inspirational and that can create an excellent educational experience for the student.

The book uses plain and lucid language to explain fundamentals of the subject. Each chapter is supported with necessary illustrations, practical examples. All the chapters in the book are arranged in a proper sequence that permits each topic to build upon earlier studies of this. All care has been taken to make students comfortable in understanding the basic concepts of the subject.

            The book not only covers the entire scope of the subject but explains the philosophy of the subject. This makes the understanding of this subject clearer and makes it more interesting. This book is suitable for any computer science students. I hope you find that it meets your needs.

CONTENTS

UNIT-I: BASIC CONCEPTS:

Database Management System – File based system – Advantages of DBMS over file based system – Database Approach – Logical DBMS Architecture – Three level architecture of DBMS or logical DBMS architecture – Need for three level architecture – Physical DBMS Architecture – Database Administrator (DBA) Functions & Role – Data files indices and Data Dictionary – Types of Database. Relational and ER Models: Data Models – Relational Model – Domains – Tuple and Relation – Super keys – Candidate keys – Primary keys and foreign key for the Relations – Relational Constraints – Domain Constraint – Key Constraint – Integrity Constraint – Update Operations and Dealing with Constraint Violations – Relational Operations – Entity Relationship (ER) Model – Entities – Attributes – Relationships – More about Entities and Relationships – Defining Relationship for College

Database – E-R Diagram – Conversion of E-R Diagram to Relational Database.

UNIT-II: DATABASE INTEGRITY AND NORMALISATION:

Relational Database Integrity – The Keys – Referential Integrity – Entity Integrity – Redundancy and Associated Problems – Single Valued Dependencies – Normalisation – Rules of Data Normalisation – The First Normal Form -The Second Normal Form – The Third Normal Form – Boyce Codd Normal Form – Attribute Preservation – Lossless-join Decomposition – Dependency Preservation. File Organisation :Physical Database Design Issues – Storage of Database on Hard Disks – File Organisation and Its Types – Heap files (Unordered files) – Sequential File Organisation – Indexed (Indexed Sequential) File Organisation – Hashed File Organisation – Types of Indexes – Index and Tree Structure – Multi-key File Organisation – Need for Multiple Access Paths – Multi-list File Organisation

– Inverted File Organisation.

UNIT-III: STRUCTURES QUERY LANGUAGE (SQL):

Meaning – SQL commands – Data Definition Language – Data Manipulation Language – Data Control Language – Transaction Control Language – Queries using Order by – Where – Group by – Nested Queries. Joins – Views – Sequences – Indexes and Synonyms – Table Handling.

UNIT-IV : TRANSACTIONS AND CONCURRENCY MANAGEMENT:

Transactions – Concurrent Transactions – Locking Protocol – Serialisable Schedules – Locks Two Phase Locking (2PL) – Deadlock and its Prevention – Optimistic Concurrency Control Database Recovery and Security: Database Recovery meaning – Kinds of failures – Failure controlling methods – Database errors – Backup & Recovery Techniques – Security & Integrity – Database Security – Authorization.

UNIT-V: DISTRIBUTED AND CLIENT SERVER DATABASES:

Need for Distributed Database Systems – Structure of Distributed Database – Advantages and Disadvantages of DDBMS – Advantages of Data Distribution – Disadvantages of Data Distribution – Data Replication – Data Fragmentation. Client Server Databases: Emergence of Client Server Architecture – Need for Client Server Computing – Structure of Client Server Systems & its advantages

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