- referential constraint
- ograniczenie referencyjne
English-Polish dictionary of Electronics and Computer Science. 2013.
English-Polish dictionary of Electronics and Computer Science. 2013.
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
Propagation constraint — In database systems, a propagation constraint details what should happen to a related table when we update a row or rows of a target table (Paul Beynon Davies, 2004, p.108). Tables are linked using primary key to foreign key relationships. It is… … 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
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
Relational database — A visual diagram showing the relationship between the two tables, as indicated by the arrow A relational database matches data by using common characteristics found within the data set. The resulting groups of data uses the relational model (a… … Wikipedia
Data Definition Language — A data definition language or data description language (DDL) is a syntax similar to a computer programming language for defining data structures, especially database schemas. Contents 1 History 2 SQL 2.1 CREATE statements … Wikipedia
Virtuoso Universal Server — Virtuoso Conductor (Database Administration User Interface) Developer(s) OpenLink Software … 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
Domain/key normal form — (DKNF) is a normal form used in database normalization which requires that the database contains no constraints other than domain constraints and key constraints. A domain constraint specifies the permissible values for a given attribute, while a … Wikipedia
Clave foranea — Saltar a navegación, búsqueda En el contexto de bases de datos relacionales, una clave foránea (o Foreign Key FK) es una limitación referencial entre dos tablas. La clave foránea identifica una columna o grupo de columnas en una tabla (tabla hija … Wikipedia Español
Niina Ning Zhang — Niina Ning Zhang, born in Hohhot, Inner Mongolia, PR China, obtained her M.A. degree in linguistics from Shanghai International Studies University, Ph.D. degree in linguistics from Shanghai International Studies University and University of… … Wikipedia