The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in...
30 KB (4,208 words) - 19:11, 26 August 2024
A relational database (RDB) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. A database management system used...
32 KB (3,839 words) - 09:34, 12 August 2024
database model: objects, classes and inheritance are directly supported in database schemas and in the query language. Also, as with pure relational systems...
12 KB (1,343 words) - 19:41, 30 August 2024
database model is the relational model, which uses a table-based format. Common logical data models for databases include: Hierarchical database model This...
21 KB (2,959 words) - 17:09, 6 August 2024
Relational models theory (RMT) is a theory of interpersonal relationships, authored by anthropologist Alan Fiske and initially developed from his fieldwork...
18 KB (1,939 words) - 00:24, 28 November 2023
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...
10 KB (1,212 words) - 20:52, 15 March 2024
Database (section 1970s, relational DBMS)
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...
75 KB (9,583 words) - 15:14, 10 August 2024
hierarchies over the same data. The hierarchical data model lost traction as Codd's relational model became the de facto standard used by virtually all mainstream...
6 KB (687 words) - 20:10, 25 August 2024
pp. 14–5 Chandler & Munday 2011c, relational models Schramm 1971, p. 14. Chandler & Munday 2011c, relational models. Babe 2015, pp. 115, 128. Schramm...
44 KB (4,511 words) - 10:14, 5 August 2024
In database theory, relational algebra is a theory that uses algebraic structures for modeling data, and defining queries on it with well founded semantics...
51 KB (6,333 words) - 19:48, 15 August 2024
Database normalization (redirect from Relational Database Normalization)
proposed by British computer scientist Edgar F. Codd as part of his relational model. Normalization entails organizing the columns (attributes) and tables...
36 KB (2,852 words) - 20:00, 17 July 2024
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...
15 KB (2,061 words) - 08:43, 5 April 2024
The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases. It is based...
12 KB (1,527 words) - 12:00, 27 July 2024
an abstract data model, that defines a data or information structure that can be implemented in a database, typically a relational database. Entity–relationship...
33 KB (4,182 words) - 17:09, 3 May 2024
model Hierarchical model Network model Relational model Concept-oriented model Star schema A data structure diagram (DSD) is a diagram and data model...
40 KB (5,059 words) - 23:27, 29 May 2024
data model can involve hundreds of related tables. Computer scientist Edgar F. Codd created a systematic method to decompose and organize relational databases...
7 KB (629 words) - 12:24, 20 May 2024
Object–relational impedance mismatch is a set of difficulties going between data in relational data stores and data in domain-driven object models. Relational...
17 KB (1,805 words) - 02:34, 24 August 2024
SQL (category Relational database management systems)
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...
40 KB (3,765 words) - 20:25, 25 August 2024
for IBM, invented the relational model for database management, the theoretical basis for relational databases and relational database management systems...
16 KB (1,420 words) - 13:05, 29 July 2024
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...
9 KB (1,011 words) - 03:22, 11 April 2024
Information Modeling Relational Model Relational Model/Tasmania Generic data models are generalizations of conventional data models. They define standardized...
24 KB (2,809 words) - 07:18, 1 August 2024
relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that is part of the relational model for...
3 KB (359 words) - 11:59, 22 April 2024
Statistical relational learning (SRL) is a subdiscipline of artificial intelligence and machine learning that is concerned with domain models that exhibit...
7 KB (708 words) - 16:40, 3 February 2024
NoSQL (redirect from Non-relational database)
or "non-relational") is an approach to database design that focuses on providing a mechanism for storage and retrieval of data that is modeled in means...
29 KB (2,404 words) - 22:55, 9 August 2024
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...
15 KB (2,295 words) - 18:23, 10 December 2022
First normal form (1NF) is a property of a relation in a relational database. A relation is in first normal form if and only if no attribute domain has...
16 KB (2,168 words) - 17:49, 13 March 2024
Graph database (category Database models)
databases. Also in the 2010s, multi-model databases that supported graph models (and other models such as relational database or document-oriented database)...
51 KB (4,647 words) - 04:13, 23 August 2024
1970s before being widely replaced by relational databases in the 1980s. While the hierarchical database model structures data as a tree of records, with...
5 KB (568 words) - 15:22, 14 December 2023
Unnormalized form (category Data modeling)
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...
6 KB (663 words) - 20:27, 25 August 2024
Christopher J. Date (redirect from Database Design and Relational Theory)
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...
4 KB (468 words) - 20:33, 12 March 2024