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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
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)
Reduction of data redundancy
interacting with the database are minimally affected. Normalized relations, and the relationship between one normalized relation and another, mirror real-world
Database_normalization
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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)
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
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
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
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
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)
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
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)
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
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
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
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
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)
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
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
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
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
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
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
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
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
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 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
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
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
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
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
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
American retired professional wrestler (born 1962)
contract dispute with WCW Executive Vice President Bill Watts. WWF talent relation officials Pat Patterson and Bruce Prichard were enamored with Scott Steiner
Scott_Steiner
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
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
State of being real
Second-Order Property and Its Relation to Quantification Casati & Fujikawa, §1. Existence as a Second-Order Property and Its Relation to Quantification Lowe
Existence
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
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
American filmmaker, actor and writer (born 1935)
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. Allen announced
Woody_Allen
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
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
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
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)
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
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)
Relational database theory concept
constraints over one relation (schema), whereas inclusion dependencies express constraints between relation schemas in a database schema. Furthermore,
Functional_dependency
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
British politician (born 1971)
Parliamentary Commissioner for Standards after complaints were made in relation to invitations to a £45-a-head Labour Party fundraising event, sent using
Karl_Turner
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
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
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
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
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
Retractable fold of skin which covers and protects the glans of the penis
evidence should be widely available to parents. Review of the literature in relation to risks and benefits shows there is no evidence of benefit outweighing
Foreskin
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
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
Theorem of expressive equivalence between relational languages
"select all tuples other than those occurring in relation R", where R is a relation in the database. Assuming different domains, i.e., sets of atomic
Codd's_theorem
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
Alphabet of the Arabic language
nisba (اَلنِّسْبَة nisbah) which is a common suffix to form adjectives of relation or pertinence. The suffix is ـِيّ -iyy for masculine (ـِيَّة -iyya(t)-
Arabic_alphabet
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
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
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
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
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
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
American photographer (born 1976)
mixed media, and visual presentation, particularly in fashion and its relation to identity. She is also known for dating actress Amber Heard. Van Ree
Tasya_van_Ree
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
Genus of mammals
Justin K. (2008). "Survival and Abundance Of Three Species Of Mice In Relation to Density Of Shrubs and Prescribed Fire In Understory Of An Oak Woodland
Peromyscus
Milkweed butterfly in the family Nymphalidae
M; Brower, L.; Malcolm, S. (1990). "Oviposition by Danaus plexippus in relation to cardenolide content of 3 Asclepias species in the Southeastern U.S.A
Monarch_butterfly
Ownership of creative expressions and processes
identical or confusingly similar to a trademark owned by another party, in relation to products or services which are identical or similar to the products
Intellectual_property
Technique used in relational databases
hierarchical queries algorithmically — without accessing the stored hierarchy relation". The standard relational algebra and relational calculus, and the SQL
Nested_set_model
Roman goddess of wisdom
Numerous loom weights have also been discovered at Lavinium, possibly in relation to the traditional association of women in prehistoric Italy with weaving
Minerva
Essential nutrient
Ooi D, et al. (August 2007). "Effectiveness and safety of vitamin D in relation to bone health". Evidence Report/Technology Assessment (158): 1–235. PMC 4781354
Vitamin_D
State of low mood and aversion to activity
Lose Your Mother sheds light on the gaps in my own efforts to track the relation between depression and the histories of slavery, genocide, and colonialism
Depression_(mood)
Identifiable Christian body with common characteristics
associate with membership of the Latin Church, and speak of themselves in relation to whichever Church they belong to: Maronites, Melkites, Ukrainian Catholics
Christian_denomination
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
Equation in thermodynamics
Applying Euler's homogeneous function theorem, one finds the following relation: U = T S − p V + ∑ i = 1 I μ i N i {\displaystyle U=TS-pV+\sum _{i=1}^{I}\mu
Gibbs–Duhem_equation
RELATION DATABASE
RELATION DATABASE
Girl/Female
Hindu, Indian
Friendship; Good Relation
Boy/Male
Tamil
Creation
Boy/Male
Muslim
Of Husain, Nisba relation
Girl/Female
Tamil
Utpatti | உதà¯à®ªà®¤à¯à®¤à®¿
Creation
Utpatti | உதà¯à®ªà®¤à¯à®¤à®¿
Boy/Male
Hindu, Indian
Relation; Connection
Girl/Female
Tamil
Srijana | à®·à¯à®°à¯€à®œà®¾à®¨à®¾
Creation
Srijana | à®·à¯à®°à¯€à®œà®¾à®¨à®¾
Boy/Male
Indian
Of Husain, Nisba relation
Girl/Female
Hindu
Creation
Boy/Male
Indian
Relation
Girl/Female
Tamil
Nirmiti | நிரà¯à®®à®¿à®¤à®¿Â
Creation
Nirmiti | நிரà¯à®®à®¿à®¤à®¿Â
Girl/Female
Hindu, Indian
Relation
Girl/Female
Arabic, Muslim
Relation; Way; Sake
Boy/Male
Tamil
Jasevaraj | ஜஸேவாராஜ
Heart of relation
Jasevaraj | ஜஸேவாராஜ
Boy/Male
Hindu, Indian
Heart of 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
Muslim
Relation, Way, Sake
Boy/Male
Hindu, Indian
Leader; Relation
Boy/Male
Hindu, Indian
Relation
Boy/Male
Assamese, Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
Friend; Relation
RELATION DATABASE
RELATION DATABASE
Girl/Female
Hindu
Exciting
Boy/Male
Indian
Lord Shiva
Male
English
English variant spelling of Celtic Alan, possibly ALLYN means "little rock."Â
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Connection; Milan; Con-incidence
Girl/Female
Arabic, Muslim
Courageous; One who Accomplishes Difficult Tasks; One who Appeals for Help Ties
Girl/Female
Indian
Love, Living, Prosperous (Wife of prophet mohammed)
Girl/Female
Tamil
Sudhiksha | ஸà¯à®¤à¯€à®•à¯à®·à®¾
Another name for Goddess Laxmi, Good start
Boy/Male
Scandinavian
Father of peace.
Surname or Lastname
English
English : from an Old Norse personal name or byname, Skragg, related to Norwegian dialect skragg ‘a shriveled, wretched person’, and English scraggy ‘lean’, ‘skinny’.
Girl/Female
Muslim/Islamic
Beautiful
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
RELATION DATABASE
a.
Indicating or specifying some relation.
a.
Not relative; without mutual relations; unconnected.
n.
A person connected by blood or affinity; strictly, one allied by blood; a relation; a kinsman or kinswoman.
a.
Having relation or reference; referring; respecting; standing in connection; pertaining; as, arguments not relative to the subject.
n.
The quality or state of being irrelative; want of connection or relation.
n.
Exposure to the free action of the air; airing; as, aeration of soil, of spawn, etc.
n.
Connection by consanguinity or affinity; kinship; relationship; as, the relation of parents and children.
n.
The act of relating or telling; also, that which is related; recital; account; narration; narrative; as, the relation of historical events.
a.
Having relation or kindred; related.
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.
Arising from relation; resulting from connection with, or reference to, something else; not absolute.
n.
A person connected by cosanguinity or affinity; a relative; a kinsman or kinswoman.
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 expressing relation; refering to an antecedent; as, a relative pronoun.
n.
A monastic or religious order subject to a regulated mode of life; the religious state; as, to enter religion.
n.
The act of a relator at whose instance a suit is begun.
n.
A relative; a relation.
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.
Corresponding relation.
n.
The act or process of relaxing, or the state of being relaxed; as, relaxation of the muscles; relaxation of a law.