MongoDB: Deleting Data with mongosh

• Deleting data in MongoDB is a crucial operation for managing your database effectively.
• This tutorial will walk you through the various scenarios and methods for deleting data using mongosh, MongoDB's command-line shell.

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1. Using mongosh

Mongosh provides a robust command-line interface for interacting with MongoDB databases, offering powerful functionalities for data manipulation.

Deleting Documents:

There are multiple ways to delete data from MongoDB collections:

• Delete Single Document: To remove a single document from a collection, you can use the deleteOne() method.
• Delete Multiple Documents: To delete multiple documents that match a specific condition, you can use the deleteMany() method.

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2. Deleting a Single Document

Steps to Delete:

1. Ensure you are connected to the MongoDB database using mongosh.
2. Identify the document you want to delete and its unique identifier.
3. Execute the following command to delete the document:

db.collection.deleteOne({ _id: ObjectId("document_id") })

Replace collection with the name of your collection and document_id with the unique identifier of the document.

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3. Deleting Multiple Documents

Steps to Delete:

1. Ensure you are connected to the MongoDB database using mongosh.
2. Determine the criteria for selecting the documents you want to delete.
3. Execute the following command to delete all documents matching the specified condition:

db.collection.deleteMany({ condition })

Replace collection with the name of your collection and condition with the criteria for selecting the documents to delete.

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4. What's Next?

Now that you've learned how to delete data using mongosh, you can effectively manage your MongoDB database by removing unwanted documents.

Continue exploring other MongoDB operations such as querying, updating, and aggregating data to enhance your database management skills further.