Object-relational Mapper (ORM) is an acronym for the object-relational mapper. ORM allows us to communicate with the database using objects from our model class, rather than performing raw SQL queries and transforming the data returned from the query into a Python object. As a result, we just interact with our models, and ORM turns these interactions into SQL queries based on the database we’re using, such as SQLite.
Object-relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between incompatible type systems in object-oriented programming languages. This creates, in effect, a “virtual object database” that can be used from within the programming language.
The heart of the problem involves translating the logical representation of the objects into an atomized form that is capable of being stored in the database, while preserving the properties of the objects and their relationships so that they can be reloaded as objects when needed.