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Object-Relational Mapping

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Abstract

In this chapter, I will go through the basics of object-relational mapping (ORM), which is basically mapping entities to tables and attributes to columns. I will then concentrate on more complex mappings such as relationships, composition, and inheritance. A domain model is made of objects interacting with each other. Objects and databases have different ways to store relationship information (through pointers or foreign keys). Inheritance is not a feature that relational databases naturally have, and therefore the mapping is not as obvious. I will go into some detail and show examples that will demonstrate how attributes, relationships, and inheritance are mapped from a domain model to a database. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

About this research paper

What this paper is about

In this chapter, I will go through the basics of object-relational mapping (ORM), which is basically mapping entities to tables and attributes to columns. I will then concentrate on more complex mappings such as relationships, composition, and inheritance. A domain model is made of objects interacting with each other. Objects and databases have different ways to store relationship information (through pointers or foreign keys). Inheritance is not a feature that relational databases naturally have, and therefore the mapping is not as obvious. I will go into some detail and show examples that will demonstrate how attributes, relationships, and inheritance are mapped from a domain model to a database. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In this chapter, I will go through the basics of object-relational mapping (ORM), which is basically mapping entities to tables and attributes to columns. I will then concentrate on more complex mappings such as relationships, composition, and inheritance. A domain model is made of objects interacting with each other. Objects and databases have different ways to store relationship information (through pointers or foreign keys). Inheritance is not a feature that relational databases naturally have, and therefore the mapping is not as obvious. I will go into some detail and show examples that will demonstrate how attributes, relationships, and inheritance are mapped from a domain model to a database. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Key concepts: Inheritance (genetic algorithm), Computer science, Relational database, Entity–relationship model, Object (grammar), Domain (mathematical analysis), Relational model, Feature (linguistics)

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