MongoDB Delete Database
- Select the database you want to delete with the help of USE <database> command. Following is the syntax of USE command. use <database_name>
- Drop the database with the help of db.dropDatabase () command. Following is the syntax of USE command. db.dropDatabase ()
How to backup and restore MongoDB database?
mongodump tool is used to take backup of MongoDB database or collection or subset of collection. mongorestore tool is used to restore database or collection on the target database. 1. To backup all databases just type mongodump without any parameters. It creates a database backup named dump/ in the current directory.
How do I create a MongoDB dump of my database?
Dump MongoDB Data. To create backup of database in MongoDB, you should use mongodump command. This command will dump the entire data of your server into the dump directory. There are many options available by which you can limit the amount of data or create backup of your remote server.
How to completely uninstall MongoDB from Linux?
sudo rm -r /var/lib/mongodb. Following is a detailed step by step process to uninstall MongoDB. Open a Terminal and follow these steps one by one sequentially. 1. Stop Mongo Daemon. We have to stop Mongo Daemon if it is already running in the system. Run the following command in a Terminal. sudo service mongod stop.
How to delete documents from MongoDB collection in Python?
Python MongoDB Delete Documents. You can delete one or more documents from a collection using delete_one() or delete_many() functions respectively. Delete One Document. delete_one() function can be called on a collection. The function takes query as an argument and deletes only the first and single document that matches the given query.
How do I delete a database collection?
First, check the available collections into your database mydb.>use mydb switched to db mydb >show collections mycol mycollection system. indexes tutorialspoint > Now drop the collection with the name mycollection.>db. mycollection. drop() true > ... >show collections mycol system. indexes tutorialspoint >
How do I delete all databases 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 drop a database in MongoDB Atlas?
If you drop a database that contains one or more collections, the collections are also removed from the storage configuration.Syntax. db.runCommand({ "dropDatabase": 1 })Parameters. Parameter. ... Output. ... Example.
How do I delete a file in MongoDB after time?
TTL index. TTL (Time-To-Live) indexes are special single-field indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of time. A background thread in mongod reads the values in the index and removes expired documents from the collection (usually every minute).
How do I manually delete a database?
How do I drop an entire database?Make a connection with the database as a sys user. $export ORACLE_SID=orcl $sqlplus / as sysdba.Shutdown the database. SQL> shu immediate.Start Database in Exclusive mode till mount stage. Start the process to drop the oracle database manually. ... Now Drop the Database. SQL> drop database;
Can you delete a database using the command?
To do delete a database you need the command 'DROP DATABASE'. The syntax is similar to creating a database. 'DROP DATABASE
Can we drop a database?
A database can be dropped regardless of its state: offline, read-only, suspect, and so on.
How do I delete a collection in MongoDB?
The MongoDB shell provides the following methods to delete documents from a collection:To delete multiple documents, use db. collection. deleteMany()To delete a single document, use db. collection. deleteOne()
What is the difference between drop and delete in MongoDB?
DELETE is a Data Manipulation Language command, DML command and is used to remove tuples/records from a relation/table. Whereas DROP is a Data Definition Language, DDL command and is used to remove named elements of schema like relations/table, constraints or entire schema.
How do I delete a property in MongoDB?
In MongoDB, you can use the $unset field update operator to completely remove a field from a document. The $unset operator is designed specifically to delete a field and its value from the document.
Does rm actually delete the file?
rm (remove files and directories permanently) This is a permanent removal; there is no trash can with the ability to recover a file. On myth , you will be prompted to remove a file, but on most linux systems, this is not the default behavior, so be careful.
How do I delete data from dataset?
Click DATA in the left navigation panel to make sure the Datasets list page is open.On the Datasets list page, find and select the dataset from which you want to delete the data.Click the View button at the top of the list.Click the Delete Data button.Click Yes to confirm the deletion.
How do I DELETE multiple 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 multiple databases?
If you want to drop multiple databases using a single statement, you can use a comma-separated list of database names after the DROP DATABASE clause. The IF EXISTS option is available from SQL Server 2016 (13. x). It allows you to conditionally delete a database only if the database already exists.
Does removing all collections in a database also remove the database MongoDB?
Yes, to all.
How do I DELETE multiple collections in MongoDB?
In MongoDB, you are allowed to delete the existing documents from the collection using db. collection. deleteMany() method. This method deletes multiple documents from the collection according to the filter.
What is a MongoDB database?
Short Description : A MongoDB Database is a container for all the collections, where Collection is a bunch of MongoDB documents similar to tables in RDBMS and Document is made of fields similar to a tuple in RDBMS, but it has a dynamic schema here.#N#Example of a Document :
How to delete a database that is not currently used?
How to delete a database which is not currently used : You can check currently selected database, using the command “ db “ . 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 “.
What is a mongo shell?
MongoShell : The mongo shell is an interactive JavaScript interface to query and update data as well as perform administrative operations in MongoDB. Detailed explanation about the Mongo shell is given on this site.
What is DB drop?
db.dropDatabase () the command is used to drop an existing database. This command will delete the currently selected database. If you have not selected any database, then it will delete the default ‘test’ database.
MongoDB Delete Database
MongoDB Delete Database – In this MongoDB Tutorial, we shall learn to drop or delete a MongoDB Database.
Example – Drop MongoDB Database
Following is an example where we shall try deleting database named tutorialkart.
Conclusion
In this MongoDB Tutorial, we learned how to delete a MongoDB Database.
The dropDatabase () Method
MongoDB db.dropDatabase () command is used to drop a existing database.
Example
First, check the list of available databases by using the command, show dbs.
What is MongoDB?
MongoDB is a document-oriented database management system and allows developers to store mammoth amounts of data. It is open-source and very efficient. It is a NoSQL type database that is it does not store data inside tables but as documents inside collections.
Which companies use MongoDB?
Companies like Facebook, Google, Adobe, Nokia, and many other top companies have chosen MongoDB to store their huge amounts of data.
What languages does database management work with?
The database management system has gained immense popularity because of its driver support for most of the popular languages such as Nodejs, PHP, Java, Go, .Net, C, C++, Python, Ruby Scala, C#, Perl, Swift, Motor, and Mongoid. It backs as a database management system for applications built on these languages.