DBMS NOTES ALL BASIC
Database: A database is a collection of related data which represents some aspect of the real world. A database system is designed to be built and populated with data for a certain task.
Database Management System (DBMS) is a software for storing and retrieving users' data while considering appropriate security measures. It consists of a group of programs which manipulate the database. The DBMS accepts the request for data from an application and instructs the operating system to provide the specific data. In large systems, a DBMS helps users and other third-party software to store and retrieve data.
Database management systems were developed to handle the following difficulties of typical File-processing systems supported by conventional operating systems.
1. Data redundancy and inconsistency
2. Difficulty in accessing data
3. Data isolation – multiple files and formats
4. Integrity problem
5. Atomicity of updates
6. Concurrent access by multiple users
7. Security problems
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