Relational databases enforce referential integrity of their tables by matching primary keys with foreign keys.

Relational databases are an important source.

* Relational databases – the set theoretic and algorithmic foundation of databases.

Relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries.

Relational databases can easily be built on an ISAM framework with the addition of logic to maintain the validity of the links between the tables.

Relational databases have generally proven superior in cases where the requirements, especially reporting requirements, change frequently or require a variety of viewpoint " angles " outside of the primary or original function.

Relational database concepts of computer science and Information retrieval concepts of digital libraries are important for understanding biological databases.

Relational databases are developed by different suppliers to common formats and conventions.

Relational databases assume a unique index is applied to a table's primary key.

Relational databases arrange data as sets of database records, also called rows.

* Relational databases

Relational databases are often normalized to eliminate duplication of information when objects may have one-to-many relationships.

Chen's main contributions are: formalized the concepts, developed a theory with a set of data definition and manipulation operations, and specified the translation rules from the ER model to several major types of databases ( including the Relational Database ).

Relational databases offered improved development productivity over CODASYL systems, and the traditional objections based on poor performance were steadily diminishing.

However Relational proponents would posit the exact opposite, because by definition object databases fix the data being recorded into a single binding abstraction.

Jet was part of a Relational Database Management System ( RDBMS ) and offered a single interface that other software could use to access Microsoft databases.

# Relational databases

Notable are the Relational and the Entity-relationship models, the atomic transaction concept and related Concurrency control techniques, Query languages and Query optimization methods, RAID, and more.

Relational ethics are related to an ethics of care.

Two notable cloud-based MySQL services are the Amazon Relational Database Service, and the Xeround Cloud Database, which runs on EC2, Rackspace and Heroku.

* Relational tables are simpler.

Relational database theory uses a set of mathematical terms, which are roughly equivalent to SQL database terminology.

* Relational theory, framework to understand reality or a physical system in such a way that the positions and other properties of objects are only meaningful relative to other objects

* Relational antonyms ( Converses ) are pairs in which one describes a relationship between two objects and the other describes the same relationship when the two objects are reversed, such as parent and child, teacher and student, or buy and sell.

However, they do not deny that there are thought processes that interact with those behaviors ( see Relational Frame Theory for more information ).

Relational data and redundancy removal are displayed: the " ship-to " associative array content is copied from the " bill-to " associative array's content as indicated by the anchor ( & ) and reference ( * ) labels.

Relational operators are also used in technical literature instead of words.

Relational operators are usually written in infix notation, if supported by the programming language, which means that they appear between their operands ( the two expressions being related ).

HOLAP ( Hybrid Online Analytical Processing ) is a combination of ROLAP ( Relational OLAP ) and MOLAP ( Multidimensional OLAP ) which are other possible implementations of OLAP.

The objection has been made that ' Relational psychoanalysis is an American phenomenon, with a politically powerful and advantageous group of members advocating for conceptual and technical reform ' from a psychologist basis: ' most identified relational analysts are psychologists, as are the founding professionals associated with initiating the relational movement '.

The virtual universe can also be accessed through a new online tool, the MRObs browser, which allows users to interact with the Millennium Run Relational Database where the properties of millions of dark matter halos and their galaxies from the Millennium project are being stored.

* Normalization — Relational normalization practices are often ignored by OO designs.

Relational relationships are usually based on idioms taken from set theory, while object relationships lean toward idioms adopted from graph theory ( including trees ).

As of 2011, he lectures on Relational Databases at the Department of Computer Science, University of Warwick ( UK ), and is a tutor for the Open University ( UK ) where he was awarded a MUniv honorary degree for academic and scholarly distinction.

# Relational question, designed to look at the relationships between two or more variables.

*" The Mainstream and the Marginalized: Reflections on Homelessness and Relational Justice "-Presentation by John C. Frame at the Harvard Carr Center for Human Rights Policy, sponsored by The Human Rights & Social Movements Program, April 16, 2010, YouTube video.

( the RIM was an acronym for Relational Information Management, a mainframe database developed at Boeing Computer Service by Erickson and used by NASA to track the heat shield tiles on its space shuttles.

While searches themselves were tuned at the SQL ( Structured Query Language ) level, additional indexes on the RDBMS ( Relational database management system ) tables were deployed.

An alternative approach, which preceded the ERM, is using the Relational model and dependencies ( mathematical relationships ) among data to normalize the database, i. e., to define the (" optimal ") relations ( data record or tupple types ) in the database.

Relational ethics in close personal relationships form a central concept of contextual therapy.

On the other hand, Relational sciences deals with relationships, interaction, communication networks, associations and relational strategies or dynamics between organisms or cognitive entities in a social system.

Relational psychoanalysis is a school of psychoanalysis in the United States that emphasizes the role of real and imagined relationships with others in mental disorder and psychotherapy.

Relational psychoanalysis began in the 1980s as an attempt to integrate interpersonal psychoanalysis's emphasis on the detailed exploration of interpersonal interactions with British object relations theory's sophisticated ideas about the psychological importance of internalized relationships with other people.

Relational aggression, also known as covert aggression, or covert bullying is a type of aggression in which harm is caused through damage to one ’ s relationships or social status.

Relational aggression is defined as a type of aggression that is " intended to harm other adolescents through deliberate manipulation of their social standing and relationships.

" Relational aggression in sibling and peer relationships during early childhood ".