Do the MongoDB databases have schema?

Yes. MongoDB databases have dynamic schema. There is no need to define the structure to create collections.

MongoDB is often described as a “schema-less” or “schema-free” database because it allows for flexible and dynamic document structures. Unlike traditional relational databases, MongoDB does not enforce a rigid, predefined schema for the data stored in its collections.

However, it’s important to note that while MongoDB doesn’t enforce a schema at the database level, individual collections within MongoDB can have a flexible schema. This means that documents within a collection can have different fields, and each document can have its own structure.

In summary, MongoDB itself does not have a rigid schema, but the concept of a schema is still applicable at the collection or document level within MongoDB.