A 'database management system' commonly referred to as DBMS is computer software designed for the purpose of managing databases based on a variety of data models. A DBMS is a complex set of software programs that controls the organization, storage, management, and retrieval of data in a database.
A DBMS includes:
- Modeling Language
- Data Structures
- Database Query Language
- Transaction Mechanism
Modeling Language: A modeling language used to define the logical schema of each database hosted in the DBMS, according to the DBMS data model. It has several models but most commonly used today is ad hoc one embedded in SQL. Data Structures: It is used to tackle with vast amount of data stored on permanent data storage devices. Database Query Language: A database query language and report writer to allow users to interactively interrogate the database, analyze its data and update it according to the users privileges on data. It also controls the security of the database. Transaction Mechanism: It Ideally would guarantee the ACID properties to ensure data integrity specifically concurrent user accesses and faults. It also contains the integrity of the data in the database.
Some of DBMS Benefits:
- Improved strategic use of corporate data
- Reduced complexity of the organization's information systems environment
- Reduced data redundancy and inconsistency
- Enhanced data integrity
- Application-data independence
- Improved security
- Reduced application development and maintenance costs
- Improved flexibility of information systems
- Increased access and availability of data and information
Examples of DBMSs include:
- Sybase Adaptive Server Enterprise
- Microsoft Access
- Microsoft SQL Server
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