|
If you are a buyer or a seller of Computer Products &
Accessories and would like to buy or offer your
products in our Online Marketplace or open your free
listing direct supply store, you have come to the right
place. We offer producers, private sellers and dealers a
place where to show their items listed for sale at
auction or fixed price offering buyers a complete line,
a huge variety of products they can choose from.
A database management system (DBMS) is computer software designed for the
purpose of managing databases based on a variety of data models.
A DBMS can be characterized as an "attribute management system" where attributes
are small chunks of information that describe something. For example, "color" is
an attribute of a car. The value of the attribute may be a color such as "red",
"blue" or "silver".
Alternatively, and especially in connection with the relational model of
database management, the relation between attributes drawn from a specified set
of domains can be seen as being primary. For instance, the database might
indicate that a car that was originally "red" might fade to "pink" in time,
provided it was of some particular "make" with an inferior paint job. Such
higher arity relationships provide information on all of the underlying domains
at the same time, with none of them being privileged above the others.
Throughout recent history specialized databases have existed for scientific,
geospatial, imaging, document storage and like uses. Functionality drawn from
such applications has lately begun appearing in mainstream DBMSs as well.
However, the main focus there, at least when aimed at the commercial data
processing market, is still on descriptive attributes on repetitive record
structures.
Thus, the DBMSs of today roll together frequently-needed services or features of
attribute management. By externalizing such functionality to the DBMS,
applications effectively share code with each other and are relieved of much
internal complexity. Features commonly offered by database management systems
include:
List of Database Management Systems
Examples of DBMSs include:
Oracle
DB2
Sybase Adaptive Server Enterprise
FileMaker
Firebird
Ingres
Informix
Microsoft Access
Microsoft SQL Server
Microsoft Visual FoxPro
MySQL
PostgreSQL
Progress
SQLite
Teradata
CSQL
OpenLink Virtuoso
Many others
Column-oriented DBMS
Data warehouse
Database-centric architecture
Directory service
Distributed database management system
Document management system
Hierarchical model
Navigational database
Network model
Object model
Object database (OODBMS)
Object-relational database (ORDBMS)
Real time database
Associative model of data (ADBMS)
Relational model (RDBMS model)
Relational database management system (RDBMS)
Run Book Automation (RBA)
Comparison of relational database management systems
SQL is a language for database management
|
