The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in...

A relational database (RDB) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. A Relational Database Management System...

database model: objects, classes and inheritance are directly supported in database schemas and in the query language. Also, as with pure relational systems...

database model is the relational model, which uses a table-based format. Common logical data models for databases include: Hierarchical database model This...

proposed by British computer scientist Edgar F. Codd as part of his relational model. Normalization entails organizing the columns (attributes) and tables...

in order to retrieve data. When the relational database model emerged, one criticism of hierarchical database models was their close dependence on application-specific...

an abstract data model, that defines a data or information structure that can be implemented in a database, typically a relational database. Entity–relationship...

systems according to the database models that they support. Relational databases became dominant in the 1980s. These model data as rows and columns in a series...

model Hierarchical model Network model Relational model Concept-oriented model Star schema A data structure diagram (DSD) is a diagram and data model...

In database theory, relational algebra is a theory that uses algebraic structures for modeling data and defining queries on it with well founded semantics...

Relational models theory (RMT) is a theory of interpersonal relationships, authored by anthropologist Alan Fiske and initially developed from his fieldwork...

Object–relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between a relational database...

languages to use Edgar F. Codd's relational model. The model was described in his influential 1970 paper, "A Relational Model of Data for Large Shared Data...

relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that is part of the relational model for...

Information Modeling Relational Model Relational Model/Tasmania Generic data models are generalizations of conventional data models. They define standardized...

systems based on E.F. Codd's relational database model were available, though HELP was much later ported to a relational architecture and commercialized...

Object–relational impedance mismatch is a set of difficulties going between data in relational data stores and data in domain-driven object models. Relational...

Relational Model/Tasmania (RM/T) was published by Edgar F. Codd in 1979 and is the name given to a number of extensions to his original relational model...

the relational model is so called because of the stating of relationships between data elements therein. This is not true. The relational model is so...

The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases. It is based...

1970s before being widely replaced by relational databases in the 1980s. While the hierarchical database model structures data as a tree of records, with...

"non-relational") refers to a type of database design that stores and retrieves data differently from the traditional table-based structure of relational databases...

data model (organization of data in a database) which does not meet any of the conditions of database normalization defined by the relational model. Database...

for IBM, invented the relational model for database management, the theoretical basis for relational databases and relational database management systems...

key–value models are examples of data models that may be supported by a multi-model database. The relational data model became popular after its publication...

databases. Also in the 2010s, multi-model databases that supported graph models (and other models such as relational database or document-oriented database)...

Codd as part of the relational model, in order to provide a declarative database-query language for data manipulation in this data model. It formed the inspiration...

with Edgar F. Codd's relational model for database management. He left IBM in 1983 and has written extensively of the relational model, in association with...

Statistical relational learning (SRL) is a subdiscipline of artificial intelligence and machine learning that is concerned with domain models that exhibit...

as values. The purpose of 1NF is to make the data model more flexible, to simplify the relational algebra and query language, and to enable further normalization...