What is the N+1 query problem in database ORM?

Can you explain the N+1 query problem in database ORM?

The N+1 query problem occurs when an application makes one query to retrieve a list of items and then makes an additional query for each item to retrieve related data, leading to performance issues.

How can I avoid the N+1 query problem?

You can avoid the N+1 problem by using techniques like eager loading, which retrieves related data in a single query, or optimizing your queries to fetch all necessary data at once.

Can you give an example of eager loading in Go?

Sure! In Go, using an ORM like GORM, you can use the Preload method to eager load related data. For example: db.Preload('Orders').Find(&users) retrieves users along with their orders in one query.

What are the performance implications of N+1 queries?

N+1 queries can significantly slow down your application, especially with large datasets, as they increase the number of database calls and can lead to higher latency.