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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

    1990s
    Object-relational mapping (ORM) emerged as a programming technique for converting data between relational databases and object-oriented languages.
    2006
    Java Persistence API (JPA) was released as a standard specification for ORM in Java.
    2020-12-01
    The Wikipedia article on Object-relational mapping was last edited.

    A variety of difficulties arise when considering how to match an object system to a relational database. These difficulties are … See more

     
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  3. What Is an ORM? How Does It Work? How Should We Use One?

  4. People also ask
    What is object-relational mapping (ORM)?An Object-Relational Mapping tool, ORM, is a framework that can help and simplify the translation between the two paradigms: objects and relational database tables. It can use class definitions (models) to create, maintain and provide full access to objects’ data and their database persistence.
    What is object-relational mapping in Computer Science?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 programming language.
    Why do we use object relational mapping?Since databases are not able to directly store objects, we use Object Relational Mapping: objects have to be mapped onto the relational database table. This means that, when you want to save an object to the database, the object is broken down into smaller parts that the database can store.
    What are object relational maps?Not to be confused with the design pattern itself, Object Relational Mapp ers are methods written in the object-oriented language. They use SQL to communicate between the object-oriented program and the database. These methods are responsible for tasks such as: interacting with an associated table.
  5. What is an ORM, how does it work, and how should I use one?

  6. What is Object-Relational Mapping (ORM) in DBMS?

  7. What is an ORM – The Meaning of Object Relational Mapping …

  8. What Is Object-Relational Mapping (ORM)? - Built In

    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 …

  9. Introduction to Object-relational mapping: the what, …

    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 …

  10. Object-relational Mappers (ORMs) - Full Stack Python

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  13. What is object-relational mapping (ORM)? – TechTarget Definition

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  16. Object Relational Mapping (ORM) for Beginners - Medium

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