Combining Null and Unset Queries
The MongoDB terrain often presents us with challenges that demand versatility and agility in our querying strategies. To address scenarios where we seek records where a field is either null or unset, we harness the power of the $or operator.
// Query for records where the field "age" is null or unset
db.collection.find({
"$or": [
{ "age": { "$exists": true, "$eq": null }},
{ "age": { "$exists": false }}
]
});
In this endeavor, we craft a query of unparalleled sophistication, traversing the labyrinth of MongoDB to unveil documents where the “age” field either lies empty or remains shrouded in obscurity.
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.
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