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Evaluation Query Operators

Evaluation operators return data based on evaluations of either individual fields or the entire collection's documents.

Note

For details on a specific operator, including syntax and examples, click on the link to the operator's reference page.

Name
Description
$expr
Allows use of aggregation expressions within the query language.
Validate documents against the given JSON Schema.
Performs a modulo operation on the value of a field and selects documents with a specified result.
Selects documents where values match a specified regular expression.
Performs text search.
Matches documents that satisfy a JavaScript expression.
←  $type$expr →
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