Codd's theorem states that relational algebra and the domain-independent relational calculus queries, two well-known foundational query languages for the...

J. Date. One of the normalised forms, the Boyce–Codd normal form, is named after him. Codd's theorem, a result proven in his seminal work on the relational...

executed from left-to-right and inside-out following their nesting. Per Codd's theorem, the relational algebra and the domain-independent relational calculus...

Coase theorem (economics) Cochran's theorem (statistics) Codd's theorem (relational model) Cohen structure theorem (commutative algebra) Cohn's irreducibility...

from relational algebra and first-order logic (which are equivalent by Codd's theorem) and the insight that important queries such as graph reachability are...

outside of pure mathematics until the publication of E.F. Codd's relational model of data in 1970. Codd proposed such an algebra as a basis for database query...

x_{1}.\exists x_{2}.R(x_{2})} , which is not domain independent; see Codd's theorem. This formula cannot be implemented in the select-project-join fragment...

shed light on, Leibniz's thought, see Zalta (2000). Boolean algebra Codd's theorem Computer algebra Universal algebra Bjarni Jónsson (1984). "Maximal Algebras...

database normalization. 3NF was originally defined by E. F. Codd in 1971. Codd's definition states that a table is in 3NF if and only if both of the following...

precisely can be translated in domain relational calculus by means of Codd's theorem), as the following example illustrates: Think of a database table "GIRLS"...

denormalization. A simple application of functional dependencies is Heath's theorem; it says that a relation R over an attribute set U and satisfying a functional...

stored in some sort of linked list of free-form records as in CODASYL, Codd's idea was to organize the data as a number of "tables", each table being...

reconstituted definition of relation (research), Handle, hdl:2027.42/4164 cited in Codd's 1970 paper. Darwen, Hugh, The Third Manifesto (TTM). Relational Databases...

theory, and database systems. In finite model theory, the Abiteboul–Vianu Theorem states that polynomial time is equal to PSPACE if and only if fixed point...

the next level of normalization after Boyce–Codd normal form (BCNF). Whereas the second, third, and Boyce–Codd normal forms are concerned with functional...

whole array. Other rules including the Von Neumann universal constructor, Codd's cellular automaton, and Langton's loops also have replicators that work...

Michael Stonebraker and his colleague Eugene Wong, having read Edgar F. Codd's work regarding the relational data model, began their own research into...

and the 2014 ACM Symposium on Principles of Database Systems. Fagin's theorem, which he proved in his PhD thesis, states that existential second-order...

"The Arimaa Challenge". Sutcliffe, Geoff (2011). "The 5th IJCAR Automated Theorem Proving System Competition - CASC-J5". AI Communications. 24 (1): 75–89...

Ian Heath in 1971. Date writes: Since that definition predated Boyce and Codd's own definition by some three years, it seems to me that BCNF ought by rights...

Blockchain-based database Concepts Database ACID Armstrong's axioms Codd's 12 rules CAP theorem CRUD Null Candidate key Foreign key Superkey Surrogate key Unique...

ancestor of" is transitive, while "is parent of" is not. Mathematical theorems are known about combinations of relation properties, such as "a transitive...

ISSN 0343-6993.* O'Connor, J J; Robertson, E F (September 1996). "The four colour theorem". Biography of Francis Guthrie at the S2A3 Biographical Database of Southern...

nouns. Examples include a computer, an employee, a song, or a mathematical theorem. A relationship captures how entities are related to one another. Relationships...

{\displaystyle \sqsubseteq } forming a preorder. The MacNeille completion theorem (1937) (that any partial order may be embedded in a complete lattice) is...

CAM—Computer-Aided Manufacturing CAP—Consistency Availability Partition tolerance (theorem) CAPTCHA—Completely Automated Public Turing Test to tell Computers and...

(1903) where Bertrand Russell made free use of these results. In 1970, Edgar Codd proposed a relational model for databases, thus anticipating the development...

row, and each type of observational unit is a table". It is equivalent to Codd's third normal form. time domain time series time series analysis time series...

Holland and others. Alexander Merkurjev proves the norm residue isomorphism theorem for the case n = 2 and ℓ = 2. April 26 – Dr. Michael R. Harrison of the...

arithmetical operations, the logarithm and the exponential (Richardson's theorem) An algebraic expression is an expression built up from algebraic constants...