MongoDB is a cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemas. MongoDB is developed by MongoDB Inc. and is free and open-source, published under a combination of the GNU Affero General Public License and the Apache License.

Example:

Let’s say you have a collection of users in MongoDB. Each user document would contain information like name, address, email, etc. You could then query the collection to find all users with a certain email address.

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