Creating and Querying Mongo Database with Mongo Shell

Creating and Querying Mongo Database with Mongo Shell

04 Jun 2024
Intermediate
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2 min read
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As you know, MongoDB shell helps you to create and query your database available on mongo server. In last article, I have described about commonly used commands and methods with mongo shell. In this article, I'll describe how to use the mongo shell to create and query your database. Refer this article for MongoDB Installation and Configuration

Create Database

Like RDBMS, there is no command to create a database in MongoDB. MangoDB will create a new database on the fly when you will insert the first record into the defined collection.

use <db_name> command is used to create database and db.<collection_name>.insert() command is used to create a collection and insert a record into it. Also, this collection will be saved to create database.

Show Databases

Now, run show dbs command to see the list of created databases. Refer above fig.

Insert Document

You can add a document item with the help of insert() method. Refer above fig.

Note

Make sure you have started your mongo db server in a separate command prompt by running following commands:

cd C:\Program Files\MongoDB\Server\3.0\bin
C:\Program Files\MongoDB\Server\3.0\bin\mongod.exe

If successful, your MongoDB server is started as shown below:

Update Document

You can modify an existing document item with the help of update() method. You must specify the document item which you want to modify. Refer below fig.

Find Document

You can find an existing document item with the help of find() method. You must specify the document item which you want to find. Refer above fig.

Delete Document

You can delete an existing document item with the help of remove() method. You must specify the document item which you want to delete.

What do you think?
That’s it for now! I hope you get a good idea how to use Mongo shell to query your mongo database. I would like to have feedback from my blog readers. Your valuable feedback, question, or comments about this article are always welcome.
Read More: Top 50 MongoDB Interview Questions and Answers
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Shailendra Chauhan (Microsoft MVP, Founder & CEO at Scholarhat by DotNetTricks)

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