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Introduction
Object-Relational Mapping (ORM) is a technique that lets you query and manipulate data from a database using an object-oriented paradigm. When talking about ORM, most people are referring to a library that implements the Object-Relational...
book_list = new List();sql = "SELECT book FROM library WHERE author = 'Linus'";data = query(sql); // I over simplify ...while (row = data.next()){book = new Book();book.setAuthor(row.get('author');book_list.add(book);}With an ORM library, it would look like this:
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Object–relational mapping - Wikipedia
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 heap of an object-oriented programming language. This creates, in effect, a virtual object database that can be used from within the … See more
Implementation-specific details of storage drivers are generally wrapped in an API in the programming language in use, exposing methods to interact with the storage medium in a way which is simpler and more in line … See more
Compared to traditional techniques of exchange between an object-oriented language and a relational database, ORM often reduces the amount of code that needs to be written. See more
1990sObject-relational mapping (ORM) emerged as a programming technique for converting data between relational databases and object-oriented languages.2006Java Persistence API (JPA) was released as a standard specification for ORM in Java.2020-12-01The Wikipedia article on Object-relational mapping was last edited.Another approach is to use an object-oriented database management system (OODBMS) or document-oriented databases See more
A variety of difficulties arise when considering how to match an object system to a relational database. These difficulties are … See more
Wikipedia text under CC-BY-SA license What Is an ORM? How Does It Work? How Should We Use One?
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WEBObject-relational mapping is a technique that maps objects onto a relational database, converting the object into data that can be stored, retrieved and reconstructed when needed. Through ORM, changes …
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WEBNov 19, 2020 · Once upon a time, there was Object Relational Mapping (ORM)... ORM is a concept that lets you manipulate data from a database through an object-oriented paradigm. In other words, it allows you to call …
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