Remove Documents

In MongoDB, the db.collection.remove() method removes documents from a collection. You can remove all documents from a collection, remove all documents that match a condition, or limit the operation to remove just a single document.

This tutorial provides examples of remove operations using the db.collection.remove() method in the mongo shell.

Remove All Documents

To remove all documents from a collection, pass an empty query document {} to the remove() method. The remove() method does not remove the indexes.

The following example removes all documents from the inventory collection:

Remove Documents that Match a Condition

To remove the documents that match a deletion criteria, call the remove()method with the <query>parameter.

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The following example removes all documents from the inventory collection where the type field equalsfood:

For large deletion operations, it may be more efficient to copy the documents that you want to keep to a new collection and then use drop()on the original collection.

Remove a Single Document that Matches a Condition

To remove a single document, call the remove() method with the justOne parameter set to true or 1.

The following example removes one document from the inventory collection where the type field equalsfood:

To delete a single document sorted by some specified order, use the find and modify method.

For indepth understanding click on

• MongoDB Tutorials
• How to install MongoDB
• Using Select in MongoDB
• Collections in MongoDB
• MongoDB Index