Database and Federated database system

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Difference between Database and Federated database system

Database vs. Federated database system

A database is an organized collection of data, stored and accessed electronically. A federated database system is a type of meta-database management system (DBMS), which transparently maps multiple autonomous database systems into a single federated database.

Atomicity (database systems)

In database systems, atomicity (or atomicness; from Greek atomos, undividable) is one of the ACID (Atomicity, Consistency, Isolation, Durability) transaction properties.

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CODASYL

CODASYL, the Conference/Committee on Data Systems Languages, was a consortium formed in 1959 to guide the development of a standard programming language that could be used on many computers.

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Computer network

A computer network, or data network, is a digital telecommunications network which allows nodes to share resources.

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Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.

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Data

Data is a set of values of qualitative or quantitative variables.

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Data model

A data model (or datamodel) is a set of tables, linked by relationships and is an abstract model that organizes elements of data and standardizes how they relate to one another and to properties of the real world entities.

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Database

A database is an organized collection of data, stored and accessed electronically.

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Database schema

The database schema of a database system is its structure described in a formal language supported by the database management system (DBMS).

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Database transaction

A transaction symbolizes a unit of work performed within a database management system (or similar system) against a database, and treated in a coherent and reliable way independent of other transactions.

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Heterogeneous database system

A heterogeneous database system is an automated (or semi-automated) system for the integration of heterogeneous, disparate database management systems to present a user with a single, unified query interface.

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Information retrieval

Information retrieval (IR) is the activity of obtaining information system resources relevant to an information need from a collection of information resources.

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Logical data model

A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product or storage technology (physical data model) but in terms of data structures such as relational tables and columns, object-oriented classes, or XML tags.

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Metadata

Metadata is "data that provides information about other data".

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Query language

Query languages or data query languages (DQLs) are computer languages used to make queries in databases and information systems.

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Relational model

The relational model (RM) for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd, where all data is represented in terms of tuples, grouped into relations.

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User (computing)

A user is a person who utilizes a computer or network service.

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User interface

The user interface (UI), in the industrial design field of human–computer interaction, is the space where interactions between humans and machines occur.

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