PRESENTED TO:Prof. R.K Paliwal

PRESENTED BY:RAHUL KAPOLIYAMBA 1ST SEM. Sec-C)

Introduction to Database DBMS and RDBMS

A Database is a collection of related data organised in a way that data can be easily accessed, managed and updated. Any piece of information can be a data, for example name of your school. Database is actually a place where related piece of information is stored and various operations can be performed on it.

DATABASE

DBMS is the abbreviated form of DataBase Management System.

Database management system is a computer software component introduced during 1960’s

A DBMS is a software that allows creation, definition and manipulation of database. Dbms is actually a tool used to perform any kind of operation on data in database. Dbms also provides protection and security to database. It maintains data consistency in case of multiple users. Here are some examples of popular dbms, MySql, Oracle, Sybase, Microsoft Access and IBM DB2 etc

DBMS

The database system can be divided into four components.

Users : Users may be of various type such as DB administrator, System developer and End users.

Database application : Database application may be Personal, Departmental, Enterprise and Internal

DBMS : Software that allow users to define, create and manages database access, Ex: MySql, Oracle etc.

Database : Collection of logical data.

Components of Database System

Dictionary Management Data Storage Management Data Transformation and PresentationSecurity ManagementMulti user Access ControlBackup and Recovery Management

Functions of DBMS

RDBMS is the abbreviated form of Relational DataBase Management System.

Relational database management system was introduced in 1970’s by E.F CODD

RDBMS avoided the navigation model as in old DBMS and introduced Relational model. The relational model has relationship between tables using primary keys, foreign keys and indexes. Thus the fetching and storing of data become faster than the old Navigational model. So RDBMS is widely used by the enterprises and developers for storing complex and large amount of data

RDBMS

1 Introduced in 1960S Introduced in 1970s.

2

During introduction it followed the navigational modes (Navigational DBMS) for data storage and fetching.

This model uses relationship between tables using primary keys, foreign keys and indexes.

3Data fetching is slower for complex and large amount of data.

Comparatively faster because of its relational model.

4Used for applications using small amount of data.

Used for huge applications using complex and large amount of data.

5

Example systems are dBase, Microsoft Acces, LibreOffice Base, FoxPro.

Example systems are SQL Server, Oracle , MySQL, Maria DB, SQLite.

Sr no. DBMS RDBMS

MCQ QUESTIONS

Q.1 Key that consist of two or more attributes that uniquely identify an entity occurance is called

a) Composite keyb) Primary keyc) Nulld) Super key

3. Data is represented in terms of (rows) in RDBMS also known as

a Attribute b. column c. None d. Tuples

4 . DBMS should provide following feature(s) ______.

a) Authorized accessb)All of thesec) Safety of the information

storedd)Protect data from system crash

5.Before use of DBMS information was stored using __________.

a) .Cloud Storageb)Data Systemc) File Management Systemd) .None of these

6. The DBMS acts as an interface between what two components of an database system ?

a) Database and SQLb) Data and Databasec) Database Application and

Databased) Database and User