- Data is can be recorded and have an implicit meaning.
- Database is a collection of related data.
- Database Management System is a software package system to facilitate the creation and maintenance of a computerized database.
- A DBMS consists of a group of programs that manipulate the database and provide an interface between the database, the user of the database and other application programs.
- It allows changing data storage structures and operations without having to change the DBMS access programs.
Advantages of DBMS: DBMS uses a variety of techniques to store & retrieve data
- Data Integrity & Security: Data Administration is when several users share data, centralizing the administration offers significant improvement.
- Concurrent Access & Crash Recovery DBMS schedules concurrent access to the data in such a manner that users think of the data as being accessed by only one user at a time.
- DBMS protects users from the ill-effects of system failures.
- Reduced Application Development Time Many important tasks are handled by the DBMS.
- Centralized control of data by the DBA avoids unnecessary duplication of data and effectively reduces the total amount of data storage required.
- Elimination of Inconsistencies: The main advantage of avoiding duplication is the elimination of inconsistencies that tend to be present in redundant data files.
- A database allows the sharing of data under its control by any number of application programs or users.
- Data Model: A set of concepts to describe the structure of a database, and certain constraints that the database should obey.
- Easy to identify specific data required to support each business unit’s operations.
- Databases support storage and manipulation of data. Databases make data management easy.
- Database Management System is a collection of programs which enables its users to access database, manipulate data, reporting, representation of data.
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