How do I view databases in MongoDB?

Asked By: Silly Porta | Last Updated: 16th April, 2020
Category: technology and computing data storage and warehousing
4.8/5 (121 Views . 13 Votes)
If you want to check your databases list, use the command show dbs. Your created database (mydb) is not present in list. To display database, you need to insert at least one document into it. In MongoDB default database is test.

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Considering this, how do I open MongoDB in terminal?

The MongoDB Shell is located in the same place as the other binaries. So to run it, open a new Terminal/Command Prompt window and enter mongo (Linux/Mac) or mongo.exe (Windows). This assumes that the path has been added to your PATH. If it hasn't, you'll need to provide the full path.

Furthermore, does MongoDB view? Views in MongoDB are read-only, and they return a collection in much the same way as a find() or aggregation() would. They are similar to views in relational databases. A view is the result of a stored aggregation on a collection, which database users can query just as if it were a persistent collection object.

Also question is, how do I show all databases in MongoDB?

Listing all the databases in mongoDB console is using the command show dbs . For more information on this, refer the Mongo Shell Command Helpers that can be used in the mongo shell. show databases //Print a list of all available databases. show dbs // Print a list of all databases on the server.

How do I switch databases in MongoDB?

Working with the mongo Shell

  1. To display the database you are using, type db :
  2. The operation should return test , which is the default database.
  3. To switch databases, issue the use <db> helper, as in the following example:
  4. See also db.
  5. To list the databases available to the user, use the helper show dbs . [

33 Related Question Answers Found

What is replica set in MongoDB?

A replica set in MongoDB is a group of mongod processes that maintain the same data set. Replica sets provide redundancy and high availability, and are the basis for all production deployments. This section introduces replication in MongoDB as well as the components and architecture of replica sets.

How does MongoDB connect to local?

To connect to your local MongoDB, you set Hostname to localhost and Port to 27017 . These values are the default for all local MongoDB connections (unless you changed them). Press connect, and you should see the databases in your local MongoDB.

How do I know if MongoDB is installed?

Open the command prompt and type "cd c:program filesmongodbserveryour versionin". After you enter the bin folder type "mongo start". If you get either a successful connection or failed one it means it's installed at least.

How do I open MongoDB in Windows 10?

To start MongoDB, run mongod.exe from the Command Prompt navigate to your MongoDB Bin folder and run mongod command, it will start MongoDB main process and The waiting for connections message in the console.

Where MongoDB data is stored?


By default, MongoDB listens for connections from clients on port 27017, and stores data in the /data/db directory. If you want mongod to store data files at a path other than /data/db you can specify a dbPath .

Is MongoDB easy to learn?

MongoDB is quite easy to learn and also implement in project. With MongoDB, no downtime is seen even a project with trillions of transactions. MongoDB supports dynamic queries on documents using a document-based query language that's nearly as powerful as SQL.

How do I know if MongoDB is running Windows?

To check mongodb version use the mongod command with --version option. On windows you will have to use full path to the mongod.exe and mongo.exe to check mongodb version, if you have not set MongoDB Path. But if MongoDb Path is being set, you can simply use the mongod and mongo command.

How do I run MongoDB on Windows 7?

MongoDB: Installing on Windows 7
  1. Accept the License Agreement.
  2. Select the Complete installation type and click Install.
  3. Briefly browse YouTube (you won't have time to make a cup of coffee).
  4. When the installation is complete press Finish.
  5. Reboot your machine.
  6. Create a folder for the data files.
  7. Create a folder for the log files.

What does a MongoDB collection consist of?

A collection is analogous to a table of an RDBMS. A collection may store documents those who are not same in structure. This is possible because MongoDB is a Schema-free database. In a relational database like MySQL, a schema defines the organization / structure of data in a database.

What is Mongoosejs?


Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node. js. It manages relationships between data, provides schema validation, and is used to translate between objects in code and the representation of those objects in MongoDB.

How many collections can MongoDB have?

A single collection can have no more than 64 indexes. Starting in version 4.2, MongoDB removes the Index Name Length Limit for MongoDB versions with featureCompatibilityVersion (fCV) set to "4.2" or greater.

How do I create a collection in MongoDB?

MongoDB Create Collection
  1. Select a MongoDB database you like to Create a Collection within, using USE command. Following is the syntax of USE command : use <database_name>
  2. Insert a record to Collection, with Collection Name mentioned in the command as shown below db.
  3. View the existing collections using following command show collections.

How do I show collections in MongoDB?

MongoDB show collection is a command from the MongoDB shell that helps in listing the collections created in the current database. To view the collection, you need to select the one that you want to view.

How do I view collections in MongoDB?

Use show collections command from MongoDB shell to list all collection created in the current database. First, select the database you want to view the collection. Select mydb database and run show collections command to list available collections in MongoDB database.

How do I rename a collection in MongoDB?


renameCollection() method is used to rename a collection. The new name of the collection. Enclose the string in quotes. If true, mongod drops the target of renameCollection prior to renaming the collection.

How do I drop a collection in MongoDB?

MongoDB Delete Collection
  1. Select the database where your collection is, with USE command. use <database_name>
  2. Verify if the collection is present. show collections.
  3. Issue drop() command on the collection.
  4. If the Collection is deleted successfully then 'true' is echoed back as acknowledgement, else 'false' would be echoed back.

What is MongoDB compass?

MongoDB Compass is a simple-to-use, sophisticated GUI that allows any user within your organization to visualize and explore your data with ad-hoc queries in just a few clicks – all with zero knowledge of the MongoDB query language.