entity-relationship model

(redirected from Entity relationship)
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entity-relationship model

(database, specification)
An approach to data modelling proposed by P. Chen in 1976. The model says that you divide your database in two logical parts, entities (e.g. "customer", "product") and relations ("buys", "pays for").

Entity-relationship diagrams can be used to represent a model.

["The entity-relationship model: toward a unified view of data", P.P. Chen, ACM Transactions on Database Systems 1:1 pp 9-36, 1976].
References in periodicals archive ?
Employee entity relationship graphs are useful for more than just monitoring insider trading.
That was down from 57 web broker entity relationships on Sept.
These are teaching students to draw entity relationship diagram, teaching students to balance a data flow diagram, requiring students to learn data collection, teaching data modeling concepts, requiring students to complete a project requiring project management skills, teaching students to draw a complete data flow diagram, teaching students to complete a project that requires the use of both data and process modeling skills, and requiring students to complete a project as a team.
Suraweera and Mitrovic (2004) devised the knowledge-based entity relationship model intelligent tutor KERMIT to assist students with design problems that have more than one correct solution.
Entity Relationship Model: classical but very well presented.
One major vendor's Internet strategy requires companies to store their databases on large, centralised data servers, an approach which is at odds with the distributed nature of the Internet This defensive strategy is shaped more by the limitations of technology than the needs of customers and highlights the relational model's inability to respond to the demands of the Internet By contrast, the new associative model of data builds on a body of academic research including triple stores, semantic networks, binary -relational techniques and the entity relationship model.
An entity relationship (ER) diagram is a useful technique for managing the development of a database information system.
The data model was an entity relationship diagram that encompassed the entire enterprise.
GISER extends the Enhanced Entity Relationship (EER) model [9] to include continuous fields.
In order to conceptualize business information needs, they create organization charts, entity relationship diagrams (ERDs), activity hierarchies, and activity dependencies.
The category concept: An extension to the Entity Relationship model.
It covers database systems and data models; design concepts (the relational database model, entity relationship modeling, advanced data modeling, and normalization of database tables); advanced design and implementation; advanced database concepts (transaction management and concurrency control, database performance tuning and query optimization, distributed database management systems, and business intelligence and data warehouses); database connectivity and web technologies; and administration and security.