Database system
 |
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2008) |
A database system is a term that is typically used to encapsulate the constructs of a data model, database Management system (DBMS) and database.[1]
A database is an organised pool of logically-related data. Data is stored within the data structures of the database. A DBMS is a suite of computer software providing the interface between users and a database or databases. A DBMS is a shell which surrounds a database or series of databases and through which all interactions take place with the database. The interactions catered for by most existing DBMS fall into four main groups:
- Data Definition. Defining new data structures for a database, removing data structures from the database, modifying the structure of existing data.
- Data Maintenance. Inserting new data into existing data structures, updating data in existing data structures, deleting data from existing data structures.
- Data Retrieval. Querying existing data by end-users and extracting data for use by application programs.
- Data Control. Creating and monitoring users of the database, restricting access to data in the database and monitoring the performance of databases.
Both a database and its DBMS conform to the principles of a particular data model.[2] Data models include the hierarchical data model, the network data model, the relational data model and the object-oriented data model.
[edit] See also
[edit] References
- ^ Beynon-Davies P. (2004). Database Systems 3rd Edition. Palgrave, Basingstoke, UK. ISBN 1-4039-1601-2
- ^ Tsitchizris, D. C. and F. H. Lochovsky (1982). Data Models. Englewood-Cliffs, Prentice-Hall.
|
|||||||||||
