Grokking MongoDB
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Query for Null or Missing Fields
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In MongoDB, it's common to encounter situations where you need to query documents that have fields with null values or fields that are missing entirely.

Understanding how to construct queries for these scenarios is essential for effective data retrieval and database management. This lesson will cover how to query for null or missing fields in MongoDB.

Querying for Null Values

Null values in MongoDB are fields that explicitly contain the value null. This is different from missing fields, which are fields that do not exist in a document at all.

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