What is the significance of N+1 query problem in SQL and ORM contexts?

Question

SQL Fundamentals — Hard

What is the significance of N+1 query problem in SQL and ORM contexts?

Accepted Answer

The N+1 query problem in SQL and ORM contexts refers to executing 1 query to fetch a list and then N additional queries to fetch related data for each item, instead of using a JOIN or eager loading. This can lead to performance issues and unnecessary database calls.