The ORM stands for Object-Relational Mapping, which is a programming technique used for converting data between relational databases and object-oriented programming languages. The goal of ORM is to provide a transparent and seamless interaction between applications and databases, reducing the amount of manual work required to persist and retrieve data from a database.
In traditional database programming, developers write raw SQL queries to interact with the database. However, this approach has several limitations, such as difficulty in maintaining complex queries, tight coupling of the application code to the database structure, and difficulty in implementing complex data relationships.
ORM solves these problems by providing a high-level, object-oriented API for database interaction. With ORM, developers can define classes and objects that correspond to database tables and rows, respectively. The ORM system then automatically generates the necessary SQL statements to perform CRUD (Create, Read, Update, Delete) operations on the database. This allows developers to interact with the database in a more intuitive, object-oriented way, without having to write complex SQL queries.
ORM frameworks, such as Hibernate, Entity Framework, and Django ORM, provide a set of tools and libraries for implementing ORM in a specific programming language and database management system. These frameworks handle the low-level details of database interaction, allowing developers to focus on writing high-level business logic.
In conclusion, ORM provides a convenient and efficient way to interact with databases, reducing the amount of manual work required and increasing the efficiency of database-related operations.