MongoDB Create Collection

MongoDB Create Collection

The MongoDB create collection operation is used to create a new collection within a database. Collections in MongoDB are analogous to tables in relational databases and are used to store documents.

Syntax

db.createCollection(name, options)

The db.createCollection() method has the following parameters:

  • name: The name of the collection to create.
  • options: Optional. A document that specifies the options for the collection (e.g., capped, size, max).

Example MongoDB Create Collection

Let's look at some examples of how to create a collection in MongoDB:

1. Basic Create Collection

db.createCollection("programGuru")

This command creates a new collection named programGuru in the current database.

2. Create a Capped Collection

db.createCollection("log", { capped: true, size: 5242880, max: 5000 })

This command creates a new capped collection named log with a maximum size of 5 MB and a maximum of 5000 documents.

Full Example

Let's go through a complete example that includes switching to a database, creating a collection, and verifying its creation.

Step 1: Switch to a Database

This step involves switching to a database named myDatabase.

use myDatabase

In this example, we switch to the myDatabase database.

MongoDB Create Collection

Step 2: Create a Collection

This step involves creating a new collection named programGuru in the myDatabase database.

db.createCollection("programGuru")

Here, we create a collection named programGuru.

MongoDB Create Collection

Step 3: Verify the Collection Creation

This step involves listing the collections in the myDatabase database to verify that programGuru has been created.

show collections

This command lists all collections in the current database. You should see programGuru in the list.

MongoDB Create Collection

Conclusion

The MongoDB create collection operation is a fundamental task for structuring your database. By understanding how to create collections, you can effectively organize and manage your data in MongoDB.