- primary key integrity
- SAP.тех. непротиворечивость первичных ключей
Универсальный англо-русский словарь. Академик.ру. 2011.
primary key integrity
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Primary source — [ [http://www.lib.umd.edu/guides/primary sources.html Primary, Secondary and Tertiary Sources, UM Libraries] ] [ [http://www.library.jcu.edu.au/LibraryGuides/primsrcs.shtml JCU Primary, Secondary Tertiary Sources] ] is a term used in a number of… … Wikipedia
Key-agreement protocol — In cryptography, a key agreement protocol is a protocol whereby two or more parties can agree on a key in such a way that both influence the outcome. If properly done, this precludes undesired third parties from forcing a key choice on the… … Wikipedia
Data integrity — in its broadest meaning refers to the trustworthiness of system resources over their entire life cycle. In more analytic terms, it is the representational faithfulness of information to the true state of the object that the information represents … Wikipedia
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
Referential integrity — in a relational database is consistency between coupled tables. Referential integrity is usually enforced by the combination of a primary key or candidate key (alternate key) and a foreign key. For referential integrity to hold, any field in 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
Unique key — In relational database design, a unique key can uniquely identify each row in a table, and is closely related to the Superkey concept. A unique key comprises a single column or a set of columns. No two distinct rows in a table can have the same… … Wikipedia
Foreign key — In the context of relational databases, a foreign key is a referential constraint between two tables. [ [http://www.visualcase.com/kbase/database basics foreign keys.htm For a simpler visualization, see VisualCase.com] ] The foreign key… … Wikipedia
Declarative Referential Integrity — (DRI) is one of the techniques in the SQL database programming language to ensure data integrity. Contents 1 Meaning in SQL 2 Product specific meaning 3 References 4 … Wikipedia
Candidate key — In the relational model, a candidate key of a relvar (relation variable) is a set of attributes of that relvar such that # at all times it holds in the relation assigned to that variable that there are no two distinct tuples with the same values… … Wikipedia
referential integrity — noun The property of a relational database that enforces valid relationships between tables, such that no foreign key can contain a value that does not match a primary key in the corresponding table … Wiktionary
