MongoDB Delete Document

The db.collection.remove() method will remove the document or documents from the collection. It’s syntax is as follows
Syntax:

 db.collection.remove(   <query>,   <justOne>)

if justOne: set to true limits removal of documents to justOne instead of all if multiple records matched for the query

Remove a single document having userid “Andrew”

 >db.users.remove({userid:”Andrew”,justOne:true})

Remove all users having Age >25

 >db.users.remove({Age:{$gt:25}})

Remove all records of 'users' collection

 >db.users.remove({})

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