How do I clear a MongoDB database?

How do I clear a MongoDB database?

The MongoDB shell provides the following methods to delete documents from a collection:

  1. To delete multiple documents, use db. collection. deleteMany() .
  2. To delete a single document, use db. collection. deleteOne() .

How do I drop all databases in MongoDB?

Then you can use “show dbs” command for checking the list of Databases. Then select the database you want to delete using command “use databasename“. Then execute db. dropDatabase() command to drop an existing database.

How do I delete a schema in MongoDB?

MongoDB Delete Database

  1. Select the database you want to delete with the help of USE command. Following is the syntax of USE command. use
  2. Drop the database with the help of db.dropDatabase() command. Following is the syntax of USE command. db.dropDatabase()

How do I reset my replica set?

To reset the configuration, make sure every node in your replica set is stopped. Then delete the “local” database for every node. Once you are confident all nodes are not running and the local database are gone, start the mongod process again (of course using the –replSet flag).

How do I remove all data 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 you clear a shell in MongoDB?

There are two commands to clear.

  1. cls command (or)
  2. Ctrl+l (clear screen)

What is drop database in MongoDB?

Definition. db.dropDatabase() Removes the current database, deleting the associated data files.

How do I delete a replica set in MongoDB?

Remove a Member Using rs. remove()

  1. Shut down the mongod instance for the member you wish to remove. To shut down the instance, connect using mongosh and use the db.
  2. Connect to the replica set’s current primary.
  3. Use rs.remove() in either of the following forms to remove the member:

What is replication in MongoDB?

In simple terms, MongoDB replication is the process of creating a copy of the same data set in more than one MongoDB server. This can be achieved by using a Replica Set. A replica set is a group of MongoDB instances that maintain the same data set and pertain to any mongod process.

How do you empty a collection in MongoDB compass?

Drop a Collection

  1. Click the trash can icon to delete a collection. From the Collections screen, click on the trash can for the collection to delete. A confirmation dialog appears.
  2. Confirm the collection to delete. In the dialog, enter the name of the collection to delete.
  3. Click Drop Collection to drop the collection.

How do I delete all records in MongoDB Atlas?

You actually can’t bulk delete in MongoDB Atlas. See MongoDB Atlas info on the filter section AKA Data Explorer. However you can run standard queries, like find, remove once you connect to the database using your Atlas credentials.

What is my MongoDB database name?

To get stats about MongoDB server, type the command db. stats() in MongoDB client. This will show the database name, number of collection and documents in the database.

What is the use of arbiter in MongoDB?

Arbiters are mongod instances that are part of a replica set but do not hold data (i.e. do not provide data redundancy). They can, however, participate in elections. Arbiters have minimal resource requirements and do not require dedicated hardware.

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