[PDF] attribute inheritance in dbms

Object-Oriented DBMS Concepts

A class hierarchy provides an inheritance mechanism which allows a class to inherit properties (attributes and methods) from its superclasses. • In single 

COSC 304 Introduction to Database Systems Enhanced Entity

?1) When using attribute inheritance can reduce the use of nulls in a single entity relation (that contains multiple subclasses).

Object-Oriented Database Systems

Problem of Multiple Inheritance. • Inherit Attributes methods from: • Both/ALL superclasses. • Only dominant superclass (all cases or only where conflict).

Enhanced Entity-Relationship (EER) Modeling

attribute and relationship inheritance Attribute Inheritance in Superclass /. Subclass Relationships. An entity that is member of a subclass inherits.

Chapter 4

Specialization/generalization. • Associated with special types of entities known as superclasses and subclasses and the process of attribute inheritance.

Chapter 2: Entity-Relationship Model E-R Diagrams

Generally most relationship sets in a database system are binary. Attribute inheritance – a lower-level entity set inherits all the.

Chapter (4) Enhanced Entity-Relationship and Object Modeling

is the union of objects of different entity types. • Concepts is the important mechanism of attribute and relationship inheritance. • Diagrammatic technique for 

Selective inheritance of attribute values in relational databases

advanced database systems - course name

Multiple inheritance occurs when a certain subtype T is a subtype of two (or more) types and hence inherits the functions (attributes and methods) of both 

Week 5 Lecture 2

INF3100/INF4100 – Database Systems OO concepts and OO-DBMS properties ... Sub-types INHERIT properties (attributes and operations) from super-types.