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Object–relational mapping

Object–relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between a relational database and the memory (usually the heap) of an object-oriented programming language. This creates, in effect, a virtual object database that can be used from within the program.

Science, Overview & Object-oriented databases

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Overview

Computer scienceProgrammingRelational databaseHeapObject-oriented programming
18 related topics

Object-oriented databases

Document-oriented databasesXML databasesJoin tablesXQuery
4 related topics

Challenges

Object–relational impedance mismatchData Access ObjectDjango
3 related topics

Comparison with traditional data access techniques

Abstraction
1 related topics

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Overview

Comparison with traditional data access techniques

Object-oriented databases

Challenges

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Map overview Semantic statistics

Object–relational mapping

Nodes31
Edges30
Triples13
Avg. degree1.94
Density0.064516
Components1

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Object–relational mapping

Top relations

see also · 12
Object–relational mapping → CORBA, FrameworkActive, Jakarta PersistenceService Data ObjectsEntity, Java Data Objects, Java Persistence API, JDO, JPA, List, Object, Object Request Broker Architecture, Structured Query Language, Table Inheritance

Important terminology Word statistics

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Important terminology

object objects object-oriented database databases relational sql data tuples language single orm phone programming code mapping entry numbers methods use

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
native XML databases that provide more flexibility in data modelinginstance ofor document-oriented databases0.80text
Object–relational mappingsee alsoList0.60section
Object–relational mappingsee alsoObject Request Broker Architecture0.60section
Object–relational mappingsee alsoCORBA0.60section
Object–relational mappingsee alsoObject0.60section
Object–relational mappingsee alsoStructured Query Language0.60section
Object–relational mappingsee alsoJava Data Objects0.60section
Object–relational mappingsee alsoJDO0.60section
Object–relational mappingsee alsoJava Persistence API0.60section
Object–relational mappingsee alsoJPA0.60section
Object–relational mappingsee alsoJakarta PersistenceService Data ObjectsEntity0.60section
Object–relational mappingsee alsoFrameworkActive0.60section

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