Data model

A data model is a model that describes in an abstract way how data is represented in a business organization, an information system or a database management system.

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This term is ambiguously defined to mean:

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• how data generally is organized, e.g. as described in Database management system. This is sometimes also called "database model"
• or how data of a specific business function is organized logically (e.g. the data model of some business)

In general the first aspect ("database model") describes the following:

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• Structure: defines how data are organized (hierarchical, network, relational, object-oriented).
• Integrity: provides a language for the definition of rules that restrict which instances of the defined structure are allowed.
• Manipulation: provides a language in which updates of the data can be expressed.
• Querying: provides a language in which the data can be queried.

For example in the relational model all data is represented by

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mathematical relations (or, to be precise, a slightly generalized version thereof).

Data model: General Organization of Data ►



 

Information system: The term information system has the following meanings:...

Database management system: A database management system (DBMS) is a computer program (or more typically, a suite of them) designed to manage a database, a large set of structured data, and run operations on the data requested by numerous users. Typical examples of DBMS use include accounting, human resources and customer supp...




Data model related Images and Photos (experimental)

Model A 1929	Top Model	Ford Model T	Ford Model T Model Kit
Model Naomi Campbell	Model Elle Macpherson	Molecular Model Kit	Pteranodon Model Kit
Model c.1982 (Teal and Orange)	The Model 1839	Moon Bus Model Kit	Model of a Frankish Warrior