functional dependency theory意为功能依赖理论，也称为FD理论。在计算机科学领域中，该理论主要用于数据库设计和管理，具体解释如下：定义：功能依赖理论描述了一个或多个属性与另一个属性之间的关系，这种关系定义了数据在数据库表中的组织方式。它表明，如果一个属性值能够唯一确定另一个属性的值，则存在...
What are Armstrong's Axioms in Functional Dependency in DBMS?Armstrong axioms are a complete set of inference rules or axioms, introduced and developed by William W. Armstrong in 1974. The inference rules are sound which is used to test logical inferences of functional dependencies. The axiom ...
functional dependency theory是什么意思:计 功能依赖理论, FD理论...,functional dependency theory中英例句,英汉词典。
英文: In 1970s, there were Theory of Modernization, Theory of Dependency, and World-System Analysis.中文: 七十年代,社会现代化理论、依附论、世界体系论,影响广泛。英文: Topics include: relational databases, SQL (Structured Query Language); types, relations, relational algebra, integrity, view; ...
DesignTheoryforRelationalDatabases 关系数据库设计理论 3.1FunctionalDependencies函数依赖(FD)– 3.1.1DefinitionofFD-pp68Section3.1.1 LetRbearelationschemeandX,YbesetsofattributesinR. AfunctionaldependencyfromXtoYexistsifandonlyif: Foreveryinstanceof|R|ofR,iftwotuplesin|R|agreeonthevaluesoftheattributesinX,...
Each of the exchange–correlation functionals in the density functional theory has been customized to particular systems or elements and has unique advantages and disadvantages. In one of the most recent research on exchange–correlation functionals, Chachiyo et al. present a relationship for exchange...
www.nature.com/scientificreports OPEN Pressure dependency of localization degree in heavy fermion CeIn3: A density functional theory analysis received: 26 April 2016 accepted: 22 July 2016 Published: 24 August 2016 M. Yazdani-Kachoei1, S. Jalali-Asadabadi1, Iftikhar Ahmad2,3 & Kourosh...
NB. dwyl's cid repo contains an example of a more advanced mix.exs file where you can see this in action Create a Hex.pm account if you do not have one already. Make sure that ex_doc is added as a dependency in you project def...
www.nature.com/scientificreports OPEN Pressure dependency of localization degree in heavy fermion CeIn3: A density functional theory analysis received: 26 April 2016 accepted: 22 July 2016 Published: 24 August 2016 M. Yazdani-Kachoei1, S. Jalali-Asadabadi1, Iftikhar Ahmad2,3 & Kourosh...