What Are Collections in Mongodb

A collection is a grouping of MongoDB documents. Documents within a collection can have different fields. A collection is the equivalent of a table in a relational database system. A collection exists within a single database.

What is the difference between a document and a collection in MongoDB?

Databases, collections, documents are important parts of MongoDB without them you are not able to store data on the MongoDB server. A Database contains a collection, and a collection contains documents and the documents contain data, they are related to each other.

How many collections can be created in MongoDB?

In general, we recommend limiting collections to 10,000 per replica set. When users begin exceeding 10,000 collections, they typically see decreases in performance. To avoid this anti-pattern, examine your database and remove unnecessary collections.