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Database Management System (DBMS) Lecture Notes for All Units -mohitsaini 2nd Edition
#1


Full Name :Mohit Kumar saini
College Name : Doon Business School
Department :CSE
Semester :V
Subject Code :404
Subject Name :data base management system(unit wise)
Study Material Description :Notes

What is DBMS ?

A database management system is the software system that allows users to define, create and maintain a database and provides controlled access to the data.
A Database Management System (DBMS) is basically a collection of programs that enables users to store, modify, and extract information from a database as per the requirements. DBMS is an intermediate layer between programs and the data. Programs access the DBMS, which then accesses the data. There are different types of DBMS ranging from small systems that run on personal computers to huge systems that run on mainframes. The following are main examples of database applications:

• Computerized library systems

• Automated teller machines

• Flight reservation systems

• Computerized parts inventory systems

A database management system is a piece of software that provides services for accessing a database, while maintaining all the required features of the data. Commercially available Database management systems in the market are dbase, FoxPro, IMS and Oracle, MySQL, SQL Servers and DB2 etc.

These systems allow users to create update, and extract information from their databases.

Compared to a manual filing system, the biggest advantages to a computerized database system are speed, accuracy, and' accessibility.

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