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Set of tuples consisting of values indexed by attributes
In database theory, a relation, as originally defined by E. F. Codd, is a set of tuples (d1,d2,...,dn), where each element dj is a member of Dj, a data
Relation_(database)
Digital database whose organization is based on the relational model of data
papers, he defined what he meant by relation. One well-known definition of what constitutes a relational database system is composed of Codd's 12 rules
Relational_database
Topics referred to by the same term
managing data Relation (database), a component of a relational database Relational algebra Relational calculus Relational database, a digital database Relationships
Relation
Organized collection of data in computing
position in relation to other data) and providing that data either directly to the user, or making it available for further processing by the database itself
Database
Reduction of data redundancy
introduced the sixth normal form (6NF) in 2003. Informally, a relational database relation is often described as "normalized" if it meets third normal form.
Database_normalization
Set of data elements in databases
are less strict about column datatype definitions. Relation (database) Row (database) Column (database) Virtual column Table (information) "cell". Merriam-Webster
Table_(database)
Database model
relational model. A table in a SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints
Relational_model
Theory of relational databases
data are stored in the database) into a single output relation (the query results). Unary operators accept a single relation as input. Examples include
Relational_algebra
Concept in relational database design
database management systems, a unique key is a candidate key. All the candidate keys of a relation can uniquely identify the records of the relation,
Unique_key
Cartesian product of mathematical fuzzy sets
A fuzzy relation is the cartesian product of mathematical fuzzy sets. Two fuzzy sets are taken as input, the fuzzy relation is then equal to the cross
Fuzzy_relation
Relationship between elements of two sets
In mathematics, a binary relation associates some elements of one set called the domain with some elements of another set (possibly the same) called the
Binary_relation
Visual representation of database system relationships
overlapping elements specified in the input mapping is also in a database schema relation. Extended overlap preservation Source-specific elements that are
Database_schema
Property that assigns truth values to k-tuples of individuals
relation is called the arity, adicity or degree of the relation. A relation with n "places" is variously called an n-ary relation, an n-adic relation
Finitary_relation
Relation with zero attributes
In mathematics, a nullary relation, 0-ary relation, or relation of degree zero is a relation with zero attributes. There are exactly two relations of degree
Nullary_relation
Relationship between two sets, defined by a set of ordered pairs
a relation denotes some kind of relationship between two objects in a set, which may or may not hold. As an example, "is less than" is a relation on
Relation_(mathematics)
as a minimal exemplar of the interrelationships found in a database. The Supplier relation holds information about suppliers. The SID attribute identifies
Suppliers_and_Parts_database
In relational databases, relvar is a term introduced by C. J. Date and Hugh Darwen as an abbreviation for relation variable in their 1995 paper The Third
Relvar
Type of unique key in a database
a type of unique key in a database formed of attributes that exist and are used in the external world outside the database (i.e. in the business domain
Natural_key
Overview of and topical guide to databases
(RDBMS) model: Relation – Table – Column – Row – View – Database transaction – Transaction log – history of actions executed by a database management system
Outline_of_databases
Level of database normalization
basic level of database normalization defined by English computer scientist Edgar F. Codd, the inventor of the relational database. A relation (or a table
First_normal_form
Database theory
The universal relation assumption in relational databases states that one can place all data attributes into a (possibly very wide) table, which may then
Universal_relation_assumption
Database data model
database normalization, unnormalized form (UNF or 0NF), also known as an unnormalized relation or non-first normal form (N1NF or NF2), is a database data
Unnormalized_form
Digital asset using a distributed ledger
are stored in a digital ledger or blockchain, which is a computerized database that uses a consensus mechanism to secure transaction records, control
Cryptocurrency
Study of computation
theory considers different ways to describe computational processes, and database theory concerns the management of repositories of data. Human–computer
Computer_science
Level of database normalization
normal form (3NF) is a level of database normalization defined by English computer scientist Edgar F. Codd. A relation (or table, in SQL) is in third normal
Third_normal_form
Type of decomposition of a database relation
In database design, a lossless join decomposition is a decomposition of a relation r {\displaystyle r} into relations r 1 , r 2 {\displaystyle r_{1},r_{2}}
Lossless_join_decomposition
Divisioning of a logical database
logical database or its constituent elements into distinct independent parts. Database partitioning refers to intentionally breaking a large database into
Partition_(database)
Relative location of objects in space
A spatial relation specifies how some object is located in space in relation to some reference object. When the reference object is much bigger than the
Spatial_relation
Vertices connected in pairs by edges
was first used in this sense by J. J. Sylvester in 1878 due to a direct relation between mathematics and chemical structure (what he called a chemico-graphical
Graph_(discrete_mathematics)
Database using graph structures for queries
roughly the equivalent of a record, relation, or row in a relational database, or a document in a document-store database. Edges, also termed graphs or relationships
Graph_database
American computer scientist (1946–1974)
he co-developed Structured Query Language (SQL) while managing the Relation Database development group for IBM in San Jose, California. He died on June
Raymond_F._Boyce
This is one of Helix's most unusual and powerful features. In the Relation, database tables (groups of related data) are created. Relations contain fields
Helix_(database)
Operation that restricts a relation to a specified set of attributes
{\displaystyle v} is an element of that attribute's domain — see Relation (database). The result of a projection Π a 1 , . . . , a n ( R ) {\displaystyle
Projection (relational algebra)
Projection_(relational_algebra)
Candidate key with two or more attributes in a database
Semantic Web Relation Database terms of reference, Keys: An overview of the different types of keys in an RDBMS Different types of keys in a database: An overview
Composite_key
Property of a thermodynamic system
applications in chemistry and physics, in biological systems and their relation to life, in cosmology, economics, and information systems including the
Entropy
Symbol representing the word "and" (&)
Ampersand is the name of a reactive programming language, which uses relation algebra to specify information systems. In SGML, XML, and HTML, the ampersand
Ampersand
Death of a region of brain cells due to poor blood flow
Barnett HJ (March 2004). "Endarterectomy for symptomatic carotid stenosis in relation to clinical subgroups and timing of surgery". Lancet. 363 (9413): 915–24
Stroke
Phylum of animals having a dorsal nerve cord
vertebrates) Class †"Placodermi" (Paleozoic armoured forms; paraphyletic in relation to all other gnathostomes) Class Chondrichthyes (cartilaginous fish; 900+
Chordate
Set of columns in a relational database
design of database schema. The definition of candidate keys can be illustrated with the following (abstract) example. Consider a relation variable (relvar)
Candidate_key
Italian actress and filmmaker (born 1975)
calling for his release after Polanski was arrested in Switzerland in relation to his 1977 charge for drugging and raping a 13-year-old girl. In 2017
Asia_Argento
Topics referred to by the same term
optimization problem that the solution must satisfy Constraint (mechanics), a relation between coordinates and momenta Constraint (computational chemistry) Constraint
Constraint
Function of managing and maintaining DBMS software
Database administration is the function of managing and maintaining database management systems (DBMS) software. Mainstream DBMS software such as Oracle
Database_administration
Level of database normalization
normal form (2NF) is a level of database normalization defined by English computer scientist Edgar F. Codd. A relation (or a table, in SQL) is in 2NF if
Second_normal_form
American professional wrestling family
Waldo Von Erich, but there was no biological relation between the two. Lance also has no biological relation to the Adkisson family. On two episodes of
Von_Erich_family
Type of database
relation of an incomplete database, described in the formalism of NULL values: There are infinitely many possible worlds for this incomplete database
Uncertain_database
Character encoding standard
Annex #24: Unicode Script Property". The Unicode Consortium. 2021. 2.2 Relation to ISO 15924 Codes. Retrieved 2022-04-29. "Scripts.txt". The Unicode Consortium
Unicode
2000 film by Christopher Nolan
BMJ: The overwhelming majority of amnesic characters in films bear little relation to any neurological or psychiatric realities of memory loss. Apparently
Memento_(film)
American filmmaker (born 1943)
film director Roman Polanski, who had been arrested in Switzerland in relation to his 1977 charge for drugging and raping a 13-year-old girl. In January
Michael_Mann
1932 Japanese film
"Retrospektive" program. "No Blood Relation". Japanese Movie Database (in Japanese). Retrieved 19 February 2021. "生さぬ仲 (No Blood Relation)". Kinenote (in Japanese)
No_Blood_Relation
SQL toolkit and object-relational mapper
corresponding database tables in the DBMS: from sqlalchemy import * from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import relation, sessionmaker
SQLAlchemy
Database model
the content. This implies that semantic databases can be integrated when they use the same (standard) relation types. This also implies that in general
Semantic_data_model
Dimensionless quantity in fluid dynamics
If density variations are related to pressure through the isentropic relation d p = c 2 d ρ {\displaystyle dp=c^{2}\,d\rho } , the nondimensionalized
Mach_number
British actor (born 1948)
Polanski, calling for his release after he was arrested in Switzerland in relation to his 1977 charge for drugging and raping a 13-year-old girl. In 2011
Jeremy_Irons
Relational database theory concept
constraints over one relation (schema), whereas inclusion dependencies express constraints between relation schemas in a database schema. Furthermore,
Functional_dependency
SQL clause
nested loops, for example, the database system will scan the entire inner relation for each row of the outer relation. One can classify query-plans involving
Join_(SQL)
Smallest transitive relation containing a given binary relation
the transitive closure R+ of a homogeneous binary relation R on a set X is the smallest relation on X that contains R and is transitive. For finite sets
Transitive_closure
Tendency of experiences to provoke laughter and provide amusement
relationship increases. Recent research suggests expressions of humour in relation to physical attractiveness are two major factors in the desire for future
Humour
Term in relational and entity–relationship theory
relational database requires the implementation of a base relation (or base table) to resolve many-to-many relationships. A base relation representing
Associative_entity
Topics referred to by the same term
partial order without incomparable pairs Total relation, which may also mean connected relation (a binary relation in which any two elements are comparable)
Total
Prize established in 1895 by Alfred Nobel
conservative Carl David af Wirsén, assessed the literary quality of a work in relation to its contribution to humanity's pursuit of the "ideal." Leo Tolstoy,
Nobel_Prize_in_Literature
Type of data model
tuples) and columns. Thus, the "relation" in "relational database" refers to the various tables in the database; a relation is a set of tuples. The columns
Database_model
Hunkpapa Lakota leader (1831–1890)
documentaries, which have reflected changing ideas about him and Lakota culture in relation to the United States. Among them are: Sitting Bull: The Hostile Sioux Indian
Sitting_Bull
Species of fish
The spinal column of M. mola contains fewer vertebrae and is shorter in relation to the body than that of any other fish. Although the sunfish descended
Ocean_sunfish
Full constraint between two sets of attributes in a relation
In database theory, a multivalued dependency is a full constraint between two sets of attributes in a relation. In contrast to the functional dependency
Multivalued_dependency
Awareness of facts, or competency
Propositional knowledge is propositional in the sense that it involves a relation to a proposition. Since propositions are often expressed through that-clauses
Knowledge
American abolitionist (1800–1859)
vigorously debate Brown's personality, sanity, motivations, morality, and relation to abolitionism. Once the Reconstruction era had ended, with the country
John_Brown_(abolitionist)
American record executive (born 1929)
Lincoln-Mercury plant, but his family connections put him in touch with Al Green (no relation to the singer Reverend Al Green), owner of the Flame Show Bar Talent Club
Berry_Gordy
Western music created during the Middle Ages
neumes", in which neumes were carefully placed at different heights in relation to each other. This allowed the neumes to give a rough indication of the
Medieval_music
Japanese manga series
certain Limitations (制約, Seiyaku), their abilities are strengthened in relation to how strict they are. An example of this is Kurapika who, in order to
Hunter_×_Hunter
Mathematical set with an ordering
pair is comparable. Formally, a partial order is a homogeneous binary relation that is reflexive, antisymmetric, and transitive. A partially ordered set
Partially_ordered_set
Set of attributes that uniquely identifies each tuple of a relation
Introduction to Database Management Systems. Tata McGraw-Hill. 2005. p. 77. ISBN 9780070591196. no two tuples in any legal relation Saiedian, H. (1996-02-01)
Superkey
Urban legend based on a region in North Atlantic
anomalies have not been found. Compasses have natural magnetic variations in relation to the magnetic poles, a fact navigators have known for centuries. Only
Bermuda_Triangle
Bitmap image file format family
context, short video clips are sometimes termed "GIFs" despite having no relation to the original file format. CompuServe introduced GIF on 15 June 1987
GIF
American engineer and programmer (born 1950)
Apple I sold for $666.66. Wozniak later said he had no idea about the relation between the number and the mark of the beast, and that he came up with
Steve_Wozniak
State of increased suggestibility
cognitive behavioral therapy since as early as 1949. Hypnosis was defined in relation to classical conditioning; where the words of the therapist were the stimuli
Hypnosis
1885 novel by Mark Twain
discuss Huck's own character, and the novel itself, in the context of its relation to African-American culture as a whole. John Alberti quotes Shelley Fisher
Adventures of Huckleberry Finn
Adventures_of_Huckleberry_Finn
Strategy used on previously-normalized databases
previously-normalized database to increase performance. In computing, denormalization is the process of trying to improve the read performance of a database, at the
Denormalization
Time zone of Bhutan
(UTC+06:00). Bhutan does not observe Daylight saving time. The IANA time zone database contains one zone for Bhutan in the file zone.tab, which is named Asia/Thimphu
Bhutan_Time
2005 film by James McTeigue
out the project with an initial draft – one that bears little, if any, relation to the finished product, with the inclusion of overtly satirical and surrealistic
V_for_Vendetta_(film)
Military personnel casualties of the United States
250 Ryden, George Herbert. The Foreign Policy of the United States in Relation to Samoa. New York: Octagon Books, 1975. (Reprint by special arrangement
United States military casualties of war
United_States_military_casualties_of_war
Marketing of products or services using digital technologies or digital tools
Post-roll advertisements were shown to have better brand recognition in relation to the other types, whereas "ad-context congruity/incongruity plays an
Digital_marketing
American actor (1949–1982)
on March 5, 1982, for possession of narcotics. This arrest was not in relation to Belushi's death. Later in 1982, Rolling Stone magazine described the
John_Belushi
Triple star system in the constellation Eridanus
the planet Vulcan orbits 40 Eridani A. Vulcan has been referenced in relation to the real-life search for exoplanets in this system. The hypothetical
40_Eridani
Database management system
database system with a mathematical relation allows it to exploit many useful techniques and theorems from set theory. But these types of databases are
Object–relational_database
Where all data references are valid
valid. In the context of relational databases, it requires that if a value of one attribute (column) of a relation (table) references a value of another
Referential_integrity
2001 Indian film by Karan Johar
Creekmur explores the film’s tagline—"It’s all about loving your parents"—in relation to its internal family dynamics. While the narrative celebrates filial
Kabhi_Khushi_Kabhie_Gham
Italian western subgenre
Huston's The Treasure of the Sierra Madre), in which the explicit homosexual relation between two of its male main characters and some gay cueing scenes are
Spaghetti_Western
Brightest star in Earth's night sky
historically attached special significance to Sirius, particularly in relation to dogs. It is often colloquially called the "Dog Star" as the brightest
Sirius
Disorder of the inner ear
progression, the evidence base is weak for all treatments. Although a causal relation between allergy and Ménière's disease is uncertain, medication to control
Ménière's_disease
(disease-annotated chromatin epigenetics resource) is a database for chromatin modifications and their relation to human disease. It was developed by the Wodak
DAnCER_(database)
Free international research database for tertiary education
in Adelaide, South Australia. The focus of the database content is the relation of post-compulsory education and training to workforce needs, skills development
VOCEDplus
Goddess from Greek mythology, wife and sister of Zeus
marriage'. Νυμφευομένη (Nympheuomenē), 'led as a bride' at Plataea, in relation to her festival Daedala. Νυμφη (Nymphē), 'bride'. Παρθένος (Parthénos)
Hera
Normal form used in database normalization
NP-complete, given a database schema in third normal form, to determine whether it violates Boyce–Codd normal form. If a relation R is not in BCNF due
Boyce–Codd_normal_form
Art and technique of designing buildings
art, dealing with aesthetic value of architecture, its semantics and its relation to the development of culture. Many philosophers and theoreticians from
Architecture
American actress (1939–2010)
narrative feature grand jury prize. In 1967, Carter married Arthur Carter (no relation), businessman and publisher of the New York Observer. Following the birth
Dixie_Carter
English association football manager (born 1959)
season. Brown faced his third improper conduct charge of the season in relation to comments he made about referee Mike Riley after the Arsenal match. He
Phil Brown (footballer, born 1959)
Phil_Brown_(footballer,_born_1959)
Essential nutrient found in citrus fruits and other foods
Block G, Levine M (April 1991). "Ascorbic acid: biologic functions and relation to cancer". Journal of the National Cancer Institute. 83 (8): 547–50. doi:10
Vitamin_C
Chemical element with atomic number 19 (K)
regulation in animals. Pergamon Press. Lans H', Stein IF, Meyer KA (1952). "The relation of serum potassium to erythrocyte potassium in normal subjects and patients
Potassium
Database of educational and research organizations
Global Research Identifier Database (GRID) is a database of educational and research organizations worldwide, created and maintained by Digital Science
Global Research Identifier Database
Global_Research_Identifier_Database
Common viral infectious disease
doi:10.1056/NEJMbkrev39523. Henle G, Henle W, Diehl V (January 1968). "Relation of Burkitt's tumor-associated herpes-ytpe virus to infectious mononucleosis"
Infectious_mononucleosis
RELATION DATABASE
RELATION DATABASE
Boy/Male
Tamil
Creation
Girl/Female
Hindu, Indian
Relation
Boy/Male
Tamil
Srinjan | à®·à¯à®°à¯€Â நà¯à®œà®¨Â
Creation
Srinjan | à®·à¯à®°à¯€Â நà¯à®œà®¨Â
Boy/Male
Tamil
Relation
Girl/Female
Hindu, Indian
Friendship; Good Relation
Boy/Male
Indian
Relation
Boy/Male
Muslim
Of Husain, Nisba relation
Boy/Male
Hindu, Indian
Heart of Relation
Girl/Female
Tamil
Srijana | à®·à¯à®°à¯€à®œà®¾à®¨à®¾
Creation
Srijana | à®·à¯à®°à¯€à®œà®¾à®¨à®¾
Girl/Female
Muslim
Relation, Way, Sake
Girl/Female
Tamil
Nirmiti | நிரà¯à®®à®¿à®¤à®¿Â
Creation
Nirmiti | நிரà¯à®®à®¿à®¤à®¿Â
Boy/Male
Hindu, Indian
Relation; Connection
Boy/Male
Assamese, Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
Friend; Relation
Girl/Female
Tamil
Utpatti | உதà¯à®ªà®¤à¯à®¤à®¿
Creation
Utpatti | உதà¯à®ªà®¤à¯à®¤à®¿
Girl/Female
Hindu
Creation
Girl/Female
Arabic, Muslim
Relation; Way; Sake
Boy/Male
Hindu, Indian
Leader; Relation
Boy/Male
Indian
Of Husain, Nisba relation
Boy/Male
Hindu, Indian
Relation
Boy/Male
Tamil
Jasevaraj | ஜஸேவாராஜ
Heart of relation
RELATION DATABASE
RELATION DATABASE
Male
Polish
Polish form of Latin Silvester, SYLWESTER means "from the forest."
Boy/Male
Gaelic
Ardent.
Girl/Female
Indian, Punjabi, Sikh
Famous; Quality
Surname or Lastname
English
English : topographic name for someone who lived by a wharf or an occupational name for someone who worked at one, from Old English hwearf ‘wharf’.
Boy/Male
Indian
Sea shore, Guide
Girl/Female
Christian, German
Noble; Kind
Girl/Female
British, English
Wealthy
Girl/Female
Hindu, Indian
A Flower
Girl/Female
African, American, Danish, Greek, Gujarati, Hindu, Indian, Japanese, Kannada, Latin, Malayalam, Marathi, Russian, Sindhi, Telugu
Born on Christmas Day; Young Girl; Form of Natalie
Girl/Female
Australian, Dutch, Netherlands, Teutonic
Holy; Famous Warrior
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
n.
The act of a relator at whose instance a suit is begun.
n.
The act or process of relaxing, or the state of being relaxed; as, relaxation of the muscles; relaxation of a law.
a.
Arising from relation; resulting from connection with, or reference to, something else; not absolute.
n.
One who, or that which, relates to, or is considered in its relation to, something else; a relative object or term; one of two object or term; one of two objects directly connected by any relation.
n.
The quality or state of being irrelative; want of connection or relation.
n.
A person connected by cosanguinity or affinity; a relative; a kinsman or kinswoman.
n.
Connection by consanguinity or affinity; kinship; relationship; as, the relation of parents and children.
a.
Having relation or kindred; related.
n.
A person connected by blood or affinity; strictly, one allied by blood; a relation; a kinsman or kinswoman.
a.
Not relative; without mutual relations; unconnected.
n.
A monastic or religious order subject to a regulated mode of life; the religious state; as, to enter religion.
n.
Corresponding relation.
n.
The state of being related or of referring; what is apprehended as appertaining to a being or quality, by considering it in its bearing upon something else; relative quality or condition; the being such and such with regard or respect to some other thing; connection; as, the relation of experience to knowledge; the relation of master to servant.
a.
Having relation or reference; referring; respecting; standing in connection; pertaining; as, arguments not relative to the subject.
a.
Indicating or expressing relation; refering to an antecedent; as, a relative pronoun.
n.
A relative; a relation.
n.
The act of relating or telling; also, that which is related; recital; account; narration; narrative; as, the relation of historical events.
n.
The carrying back, and giving effect or operation to, an act or proceeding frrom some previous date or time, by a sort of fiction, as if it had happened or begun at that time. In such case the act is said to take effect by relation.
a.
Indicating or specifying some relation.
n.
Exposure to the free action of the air; airing; as, aeration of soil, of spawn, etc.