How do I delete a collection in MongoDB?

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How do I delete a collection in MongoDB?

To delete a MongoDB Collection, use db. collection. drop() command.

Which function will remove collection in MongoDB?

remove() method
MongoDB’s remove() method is used to remove a document from the collection. remove() method accepts two parameters. One is deletion criteria and second is justOne flag. deletion criteria − (Optional) deletion criteria according to documents will be removed.

How do I drop a collection in MongoDB Atlas?

The drop command removes the specified collection or view from the Atlas Data Lake storage configuration. Use the wildcard “*” to remove all collections generated by the wildcard collection function (that is, collectionName() ), including the wildcard collection rule itself.

How do I delete collections?

Delete a collection

  1. On an Android phone or tablet, open the Currents app .
  2. At the bottom, tap Collections.
  3. Tap a collection.
  4. Tap More. ​Delete collection.
  5. Check the box, then tap Delete.

Which of the following function will remove collection in MongoDB Mcq?

remove() The remove() method removes documents from the database. It can remove one or all documents from the collection that matches the given query expression.

How do I remove all files from a collection in MongoDB?

To delete all documents in a collection, pass an empty document ( {} ). Optional. To limit the deletion to just one document, set to true . Omit to use the default value of false and delete all documents matching the deletion criteria.

How do I remove an unpaid collection from my credit report?

Typically, the only way to remove a collection account from your credit reports is by disputing it. But if the collection is legitimate, even if it’s paid, it’ll likely only be removed once the credit bureaus are required to do so by law.

– Delete Document. To delete one document, we use the delete_one () method. – Delete Many Documents. To delete more than one document, use the delete_many () method. – Delete All Documents in a Collection. To delete all documents in a collection, pass an empty query object to the delete_many () method:

How to delete documents from a collection in MongoDB?

Delete Document. To delete a record, or document as it is called in MongoDB, we use the deleteOne () method. The first parameter of the deleteOne () method is a query object defining which document to delete. Note: If the query finds more than one document, only the first occurrence is deleted.

How to empty a collection in MongoDB?

Collection name

  • Number of documents in the collection Note Compass bases the document count that appears on the Collections screen on cached metadata using collStats.
  • Average size of documents in the collection
  • Total size of all documents in the collection
  • Number of indexes on the collection
  • Total size of all indexes on the collection

    • How to retrieve documents from a collection in MongoDB?

    Create a MongoDB client by instantiating the MongoClient class.

  • Connect to a database using the getDatabase () method.
  • Get the object of the collection from which you want to retrieve the documents,using the getCollection () method.
  • Retrieve the iterable object containing all the documents of the current collection by invoking the find () method.