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
`$expr`	Allows use of aggregation expressions within the query language.
`$jsonSchema`	Validate documents against the given JSON Schema.
`$mod`	Performs a modulo operation on the value of a field and selects documents with a specified result.
`$regex`	Selects documents where values match a specified regular expression.
`$text`	Performs text search. Note `$text` provides text query capabilities for self-managed (non-Atlas) deployments. For data hosted on MongoDB Atlas, MongoDB offers an improved full-text query solution, Atlas Search.
`$where`	Matches documents that satisfy a JavaScript expression.