Querying for Unset Fields
As we traverse the MongoDB landscape, we encounter scenarios where our quest leads us to unset fields. Fear not, for MongoDB furnishes us with the $exists operator as our trusty companion.
// Query for records where the field "address" is unset
db.collection.find({ "address": { "$exists": false }});
In this query, we navigate MongoDB to find documents where the “age” field is either empty or unclear.
How to Query for Records Where Field is Null or Not Set in MongoDB?
MongoDB is a popular NoSQL database known for its flexibility and scalability. When working with MongoDB, you might encounter scenarios where you need to query for records where a specific field is either null or not set. In this article, we’ll explore how to perform such queries in MongoDB, along with detailed examples to illustrate the process.