Information about Database Model

A database model is a theory or specification describing how a database is structured and used. Several such models have been suggested.

Common models include:

• Hierarchical model
• Network model
• Relational model
• Entity-relationship

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In a hierarchical data model, data are organized into a tree-like structure. The structure allows repeating information using parent/child relationships: each parent can have many children but each child only has one parent.
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The network model is a database model conceived as a flexible way of representing objects and their relationships. Its original inventor was Charles Bachman, and it was developed into a standard specification published in 1969 by the CODASYL Consortium.
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The relational model for database management is a database model based on predicate logic and set theory. It was first formulated and proposed in 1969 by Edgar Codd with aims that included avoiding, without loss of completeness, the need to write computer programs to
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An object-relational database (ORD) or object-relational database management system (ORDBMS) is a relational database management system that allows developers to integrate the database with their own custom data types and methods.
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'' In an object oriented database, information is represented in the form of objects'' as used in Object-Oriented Programming. When database capabilities are combined with object programming language capabilities, the result is an object database management system (ODBMS).
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The associative model of data is an alternative data model for database systems. Other data models, such as the relational model and the object data model, are record-based. These models involve encompassing attributes about a thing, such as a car, in a record structure.
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The concept-oriented data model is a data model based on lattice theory and ordered sets. Another source of inspiration in creating this model is formal concept analysis (FCA).
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Multidimensional databases are variously (depending on the context) data aggregators which combine data from a multitude of data sources; databases which offer networks, hierarchies, arrays and other data formats difficult to model in SQL; or databases which give a high degree of
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The star schema (sometimes referenced as star join schema) is the simplest style of data warehouse schema, consisting of a few "fact tables" (possibly only one, justifying the name) referencing any number of "dimension tables".
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XML-enabled. These map all XML to a traditional database (such as a relational database), accepting XML as input and rendering XML as output.

Native XML (NXD) The internal model of such databases depends on XML and uses XML documents as the fundamental unit of storage.
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database is a structured collection of records or data that is stored in a computer system so that a computer program or person using a query language can consult it to answer queries. The records retrieved in answer to queries are information that can be used to make decisions.
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In a hierarchical data model, data are organized into a tree-like structure. The structure allows repeating information using parent/child relationships: each parent can have many children but each child only has one parent.
..... Click the link for more information.

The network model is a database model conceived as a flexible way of representing objects and their relationships. Its original inventor was Charles Bachman, and it was developed into a standard specification published in 1969 by the CODASYL Consortium.
..... Click the link for more information.

The relational model for database management is a database model based on predicate logic and set theory. It was first formulated and proposed in 1969 by Edgar Codd with aims that included avoiding, without loss of completeness, the need to write computer programs to
..... Click the link for more information.

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An object-relational database (ORD) or object-relational database management system (ORDBMS) is a relational database management system that allows developers to integrate the database with their own custom data types and methods.
..... Click the link for more information.

In computing, object model has two related but distinct meanings:

1. The properties of objects in general, in a specific computer programming language, technology, notation or methodology that uses them.

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The associative model of data is an alternative data model for database systems. Other data models, such as the relational model and the object data model, are record-based. These models involve encompassing attributes about a thing, such as a car, in a record structure.
..... Click the link for more information.

The concept-oriented data model is a data model based on lattice theory and ordered sets. Another source of inspiration in creating this model is formal concept analysis (FCA).
..... Click the link for more information.

Entity-Attribute-Value model (EAV), also known as "Object-Attribute-Value Model" and "Open Schema" is a data model that is used in circumstances where the number of attributes (properties, parameters) that can be used to describe a thing (an "entity" or "object") is potentially
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Multidimensional databases are variously (depending on the context) data aggregators which combine data from a multitude of data sources; databases which offer networks, hierarchies, arrays and other data formats difficult to model in SQL; or databases which give a high degree of
..... Click the link for more information.

The semi-structured model is a database model. In this model, there is no separation between the data and the schema, and the amount of structure used depends on the purpose.
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The star schema (sometimes referenced as star join schema) is the simplest style of data warehouse schema, consisting of a few "fact tables" (possibly only one, justifying the name) referencing any number of "dimension tables".
..... Click the link for more information.

XML-enabled. These map all XML to a traditional database (such as a relational database), accepting XML as input and rendering XML as output.

Native XML (NXD) The internal model of such databases depends on XML and uses XML documents as the fundamental unit of storage.
..... Click the link for more information.

A data model is not just a way of structuring data: it also defines a set of operations that can be performed on the data. The relational model, for example, defines operations such as select, project, and join.
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A database management system (DBMS) is computer software designed for the purpose of managing databases. Typical examples of DBMSs include Oracle, DB2, Microsoft Access, Microsoft SQL Server, PostgreSQL, MySQL, FileMaker and Sybase Adaptive Server Enterprise.
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database is a structured collection of records or data that is stored in a computer system so that a computer program or person using a query language can consult it to answer queries. The records retrieved in answer to queries are information that can be used to make decisions.
..... Click the link for more information.

A data model is not just a way of structuring data: it also defines a set of operations that can be performed on the data. The relational model, for example, defines operations such as select, project, and join.
..... Click the link for more information.

flat file database describes any of various means to encode a data model (most commonly a table) as a plain text file.

Unordered

Unordered storage typically stores the records in the order they are inserted, while having
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