MongoDB

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MongoDB is a cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License (SSPL).

Readings

1. Wikipedia: MongoDB
2. Wikipedia: Document-oriented database

Activities

MongoDB Environment

Establish a MongoDB environment using one of the following:

• Docker Playground
• MongoDB in Docker
• Install MongoDB

Docker Playground

Docker Playground is a free online Docker environment. It requires no installation or configuration.

1. Use Play with Docker. Create an account and/or log in.
2. Start an interactive session and add a new instance.
3. In the terminal window, enter the following commands:
   • docker run -d --name=mongo-server mongo
   • docker exec -it mongo-server bash
   • mongosh

MongoDB in Docker

You can use your own Docker environment to run MongoDB.

1. Install Docker Desktop or the Docker Engine.
2. In a terminal window, run the following commands:
   • docker run -d --name=mongo-server mongo
   • docker exec -it mongo-server bash
   • mongosh

Install MongoDB

Install MongoDB on your own system.

1. Review MongoDB: Tutorials
2. Download and install MongoDB.
3. Use the following terminal command to access the MongoDB command interface:
   • mongosh

MongoDB Activities

Create a Collection

1. Use the following MongoDB commands to create a temperature database and document collection:
   use temperature
db.countries.insertMany( [
    { country: "Bulgaria", temperature: "45.2 °C" },
    { country: "Canada", temperature: "45 °C" },
    { country: "Federated States of Micronesia", temperature: "36.1 °C" },
    { country: "Finland", temperature: "37.2 °C" },
    { country: "Germany", temperature: "40.3 °C" },
    { country: "Japan", temperature: "41 °C" },
    { country: "Marshall Islands", temperature: "35.6 °C" },
    { country: "Palau", temperature: "35 °C" },
    { country: "Turkmenistan", temperature: "50.1 °C" },
] );
2. Use the following MongoDB command to show existing databases:
   show databases
3. Use the following MongoDB command to show existing collections:
   show collections

Query a MongoDB Database

1. Use the following MongoDB commands to query the countries collection in the temperature database:
   db.countries.find()

Insert a Document

1. Use the following MongoDB command to insert a temperature document:
   db.countries.insertOne( { country: "United States of America", temperature: "56.7 °C" } )
2. Use the following MongoDB command to display the inserted document:
   db.countries.find( {country: "United States of America"} )

Update a Document

1. Use the following MongoDB command to update a temperature document:
   db.countries.update(
    { country: "United States of America" },
    { $set: { temperature: "56.5 °C" } }
)
2. Use the following MongoDB command to display the inserted document:
   db.countries.find( {country: "United States of America"} )

Remove a Document

1. Use the following MongoDB command to remove a temperature document:
   db.countries.remove( { country: "United States of America" } )
2. Use the following MongoDB command to display the remaining documents:
   db.countries.find()

Remove All Documents

1. Use the following MongoDB command to remove a temperature document:
   db.countries.remove({})
2. Use the following MongoDB command to verify there are no remaining documents:
   db.countries.find()

Drop a Collection

1. Use the following MongoDB command to show existing collections:
   show collections
2. Use the following MongoDB command to remove the countries collection:
   db.countries.drop()
3. Use the following MongoDB command to show existing collections:
   show collections

Drop a Database

1. Use the following MongoDB command to show existing databases:
   show databases
2. Use the following MongoDB command to remove the temperature database:
   db.dropDatabase()
3. Use the following MongoDB command to show existing databases:
   show databases

See Also

• Databases
• Docker
• TutorialsPoint: MongoDB