what is the use of select_related in django

The select_related() method in Django is used to optimize database queries and reduce the number of database queries required to fetch related objects. It works by fetching related objects in the same SQL query as the original object, instead of fetching them in separate SQL queries. This can significantly improve the performance of your application, especially when dealing with large datasets or complex relationships between objects.

For example, if you have a model with a foreign key relationship to another model, using select_related() can help you fetch both objects in a single query instead of two separate queries. This can save a lot of time and resources, especially when dealing with large datasets.

In summary, select_related() is used to reduce the number of database queries required to fetch related objects, and improve the performance of your application.