Boolean

The Boolean data type in MongoDB is used to store true or false values. Booleans are used when you want to represent a binary state, where a field can have one of two possible values. MongoDB supports the standard true and false literals for this data type.

Examples of usage can include representing active/inactive statuses, toggling settings (e.g., sending email notifications), and denoting the presence/absence of a specific feature.

Storing Boolean Data

To store a boolean data value in a MongoDB document, you may use the true or false literals. Here's an example of a document containing a boolean field named isActive:

{
    "name": "John Doe",
    "isActive": true,
    "email": "john.doe@example.com"
}

Querying Data by Boolean Value

When you need to query documents based on a boolean value, you can use a query filter that specifies the desired boolean value. For example, if you want to find all active users in the users collection:

db.users.find({ isActive: true });

Similarly, you can retrieve all inactive users with the following query:

db.users.find({ isActive: false });

Updating Boolean Data

Updating or modifying boolean values is as simple as using the $set operator with the desired new value. Let's say we want to deactivate a user:

db.users.updateOne({ name: 'John Doe' }, { $set: { isActive: false } });

This would change the user's isActive field value to false in the document.

Conclusion

Boolean data types in MongoDB provide a simple and efficient way to represent binary states. Utilize booleans to store true/false values and streamline queries, updates, and other operations to manage data with binary characteristics.