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Field Update Operators

Note

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

Name
Description
$currentDate
Sets the value of a field to current date, either as a Date or a Timestamp.
Increments the value of the field by the specified amount.
Only updates the field if the specified value is less than the existing field value.
Only updates the field if the specified value is greater than the existing field value.
Multiplies the value of the field by the specified amount.
Renames a field.
Sets the value of a field in a document.
Sets the value of a field if an update results in an insert of a document. Has no effect on update operations that modify existing documents.
Removes the specified field from a document.

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