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Terminology

Robin Lee-Delisle Database Systems Inglés 8 fichas

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1What is a relation?A relation is a table with columns and rows
2What is an attribute?An attribute is a named column of a relation
3What is a domain?A domain is a set of allowable values for one or more attributes
4What is a tuple?A tuple is a row in a relation
5What is a degree?A degree of a relation is the number of attributes it contains
6What is cardinality?The cardinality of a relation is the number of tuples it contains
7What is a relational database?A relational database is a collection of normalised relations with distinct relation names
8What is a superkey?An attrib

Descripción: (Relational model) Database Systems Fichas sobre Terminology, creado por Robin Lee-Delisle el 19/07/2017.
Creado por: Robin Lee-Delisle
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