Knowledge in Database Management System
Relational Database with E-R modeling in database systems
This PDF Contains basics of Relational Database with E-R modeling in database systems
Prince S. Malav
Relational Database in Database systems
This PDF Contains basics of Relational Database in database systems.
SQl assertions and View in database systems
This PDF Contains basics of SQl assertions and View in database systems.
SQL schema and Queries in Database systems.
This PDF Contains basics of SQL schema and Queries
Type of database and Its user
This PDF Contains basics of Type of database and Its user
UML modeling in Database System
This PDF Contains basics of UML modeling in Database System
Disk Storage, Basic File Structures, and Hashing
this pdf is about Disk Storage, Basic File Structures, and Hashing in Database management system
Indexing Structures for Files
this pdf is about Indexing Structures for Files in Database management system
Introduction to Transaction Processing Concepts and Theory
this pdf is about Introduction to Transaction Processing Concepts and Theory in Database management system
Object Database Standards, Languages, and Design
this pdf is about Object Database Standards, Languages, and Design in Database management system
Relational Database Design Algorithms and Further Dependencies
this pdf is about Relational Database Design Algorithms and Further Dependencies in Database management system
Database Management Systems
Database Management System or DBMS in short refers to the technology of storing and retrieving usersí data with utmost efficiency along with appropriate security measures. This tutorial explains the basics of DBMS such as its architecture, data models, data schemas, data independence, E-R model, relation model, relational database design, and storage and file structure and much more.Why to Learn DBMS?Traditionally, data was organized in file formats. DBMS was a new concept then, and all the research was done to make it overcome the deficiencies in traditional style of data management. A modern DBMS has the following characteristics −Real-world entity − A modern DBMS is more realistic and uses real-world entities to design its architecture. It uses the behavior and attributes too. For example, a school database may use students as an entity and their age as an attribute.Relation-based tables − DBMS allows entities and relations among them to form tables. A user can understand the architecture of a database just by looking at the table names.Isolation of data and application − A database system is entirely different than its data. A database is an active entity, whereas data is said to be passive, on which the database works and organizes. DBMS also stores metadata, which is data about data, to ease its own process.Less redundancy − DBMS follows the rules of normalization, which splits a relation when any of its attributes is having redundancy in values. Normalization is a mathematically rich and scientific process that reduces data redundancy.Consistency − Consistency is a state where every relation in a database remains consistent. There exist methods and techniques, which can detect attempt of leaving database in inconsistent state. A DBMS can provide greater consistency as compared to earlier forms of data storing applications like file-processing systems.Query Language − DBMS is equipped with query language, which makes it more efficient to retrieve and manipulate data. A user can apply as many and as different filtering options as required to retrieve a set of data. Traditionally it was not possible where file-processing system was used.
Ritasri Maity