- entity primary key
- первичный ключ сущности
Англо-русский словарь по вычислительной технике и информационным технологиям - 4-е изд.. Сергей Орлов .
entity primary key
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Entity integrity — In the relational data model, entity integrity is one of the three inherent integrity rules. Entity integrity is an integrity rule which states that every table must have a primary key and that the column or columns chosen to be the primary key… … Wikipedia
Entity-relationship model — A sample Entity relationship diagram using Chen s notation In software engineering, an entity relationship model (ERM) is an abstract and conceptual representation of data. Entity relationship modeling is a database modeling method, used to… … Wikipedia
Entity Bean — An Entity Bean is a type of Enterprise JavaBean, a server side J2EE component, that represents persistent data maintained in a database. An entity bean can manage its own persistence (Bean managed persistence) or can delegate this function to its … Wikipedia
Entity–attribute–value model — (EAV) is a data model to describe entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest. In… … Wikipedia
Entity-attribute-value model — (EAV), also known as object attribute value model and open schema is a data model that is used in circumstances where the number of attributes (properties, parameters) that can be used to describe a thing (an entity or object ) is potentially… … Wikipedia
Entity-Level Controls — Accountancy Key concepts Accountant · Accounting period · Bookkeeping · Cash and accrual basis · Cash flow management · Chart of accounts … Wikipedia
Weak entity — In a relational database, a Weak Entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a… … Wikipedia
Surrogate key — A surrogate key in a database is a unique identifier for either an entity in the modeled world or an object in the database. The surrogate key is not derived from application data. Definition Two definitions of a surrogate appear in the… … Wikipedia
Compound key — In database design, a compound key is a key that consists of 2 or more attributes that uniquely identify an entity occurrence. Each attribute that makes up the compound key is a simple key in its own right. This is often confused with a composite … Wikipedia
Strukturiertes Entity-Relationship-Modell — Die Strukturierte Entity Relationship Modellierung (SERM) erhebt den Anspruch, die Datenmodellierung nach der Entity Relationship Methode zu erweitern. Sie wurde ursprünglich 1989 von Prof. Dr. Elmar Sinz (Universität Bamberg) veröffentlicht und… … Deutsch Wikipedia
Structured-Entity-Relationship-Modell — Die Strukturierte Entity Relationship Modellierung (SERM) erhebt den Anspruch, die Datenmodellierung nach der Entity Relationship Methode zu erweitern. Sie wurde ursprünglich 1989 von Prof. Dr. Elmar J. Sinz (Universität Bamberg) veröffentlicht… … Deutsch Wikipedia
