MongoDB $exists
- The
MongoDB
$exists
operator in MongoDB is used to query documents where a particular field exists or does not exist. - This operator can take a boolean value (
true
orfalse
):true
: It signifies that Matches documents that contain the field.false
: It signifies Matches documents that do not contain the field.
The basic syntax for using the $exists
the operator is as follows:
{ field: { $exists: <boolean> } }
How to Check Field Existence in MongoDB?
MongoDB is a NoSQL database that offers a variety of operators to enhance the flexibility and precision of queries. One such operator is $exists
, which is used to check the presence of a field in a document.
In this article will learn about the $exists
Operator in MongoDB by covering its syntax and practical applications. We will also learn about how to query data using Atlas Search.
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