MongoDB: Updating Documents with mongosh

Updating documents in MongoDB is a crucial operation for modifying existing data according to changing requirements.
This tutorial will guide you through various scenarios of updating documents using mongosh, MongoDB's command-line shell.

1. Using mongosh

Mongosh provides a convenient interface for executing MongoDB commands and operations, including updates to documents.

Updating a Document:

Ensure you're connected to the MongoDB database using mongosh.
Identify the document(s) you wish to update based on specific criteria.
Execute the update operation using the appropriate MongoDB update command.

2. Updating Single Document

To update a single document, use the updateOne() method:

db.collection.updateOne({ filter }, { $set: { update } })

Replace { filter } with the criteria to identify the document and { $set: { update } } with the fields to be updated.

3. Updating Multiple Documents

To update multiple documents, use the updateMany() method:

db.collection.updateMany({ filter }, { $set: { update } })

Similar to updateOne(), replace { filter } with the criteria and { $set: { update } } with the updates to be applied.

4. Updating with Additional Operators

Besides $set, MongoDB provides various update operators for specific update operations:

$inc: Increment numeric field values.
$push: Append elements to an array field.
$pull: Remove elements from an array field.
And more...

Explore MongoDB documentation for a comprehensive list of update operators and their usage.

5. What's Next?

Congratulations! You've learned how to update documents using mongosh in MongoDB. Now, you're ready to efficiently manage your data by performing updates tailored to your application's requirements.

Continue honing your MongoDB skills by exploring other essential operations such as querying, indexing, and aggregation to maximize the potential of your MongoDB databases.

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