MongoDB cursors are a powerful tool that can be used to iterate through the results of a query. They are similar to iterators in other programming languages, but they have some additional features that make them unique to MongoDB.
What is a MongoDB cursor?
A MongoDB cursor is a pointer to the results of a query. It is not the results themselves, but rather a way to access them. When you run a query in MongoDB, it returns a cursor object. You can then use this cursor to iterate through the results of the query one at a time.
Why are MongoDB cursors important?
There are a number of reasons why MongoDB cursors are important:
They are efficient: Cursors allow you to process large amounts of data without having to load all of the data into memory at once. This can be important for performance reasons.
They are flexible: Cursors can be used in a variety of ways. For example, you can use them to filter results, sort results, and limit the number of results returned.
They are easy to use: Cursors are easy to use, even for beginners.
How to use MongoDB cursors
The find() method: This method returns a cursor object that can be used to iterate through the results of a query.