In this section, we will cover how to create documents in MongoDB. Documents are the basic unit of data in MongoDB, similar to rows in a relational database. Each document is a JSON-like object that can contain various fields and data types.

1. Document Structure: Documents in MongoDB are stored in collections. Each document is a JSON-like object.
2. Inserting Documents: The primary method to insert documents into a collection is using the insertOne and insertMany methods.
3. Data Types: MongoDB supports various data types, including strings, numbers, arrays, and embedded documents.

A document in MongoDB is a JSON-like object. Here is an example of a simple document:

The insertOne method is used to insert a single document into a collection.

Syntax:

Example:

The insertMany method is used to insert multiple documents into a collection.

Syntax:

Example:

Task: Insert a single document into a collection named products with the following fields:

• name: "Laptop"
• brand: "Dell"
• price: 1200
• stock: 50

Solution:

Task: Insert multiple documents into a collection named products with the following fields:

1. name: "Smartphone", brand: "Apple", price: 999, stock: 30
2. name: "Tablet", brand: "Samsung", price: 600, stock: 20

Solution:

1. Missing Fields: Ensure that all required fields are included in the document.
2. Data Types: Verify that the data types of the fields are correct. For example, the price field should be a number, not a string.
3. Unique Fields: If a field is supposed to be unique (e.g., email), ensure that you handle duplicates appropriately.

In this section, we learned how to create documents in MongoDB using the insertOne and insertMany methods. We also covered the structure of a document and provided practical exercises to reinforce the concepts. In the next section, we will explore how to read documents from a MongoDB collection.