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. |
$where | Matches documents that satisfy a JavaScript expression. |