How to Use $exists, $type, and $regex for Queries in MongoDB
13:07
YouTubeProgrammingKnowledge
How to Use $exists, $type, and $regex for Queries in MongoDB
Master three of MongoDB's most useful and specific query operators! This tutorial shows you how to find documents based on field existence, data type, or text patterns. What you will learn: $exists (Element Operator): How to find documents that have a specific field ($exists: true), or are missing a specific field ($exists: false). This is ...
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