Name

Description

$inc

Increments the value of the field by the specified amount.

$mul

Multiplies the value of the field by the specified amount.

$rename

Renames a field.

$setOnInsert

Sets the value of a field if an update results in an insert of a document. It has no effect on update operations and modify existing documents.

$set

Sets the value of a field in a document.

$unset

Removes the specified field from a document.

$min

Only updates the field if the specified value is less than the existing field value.

$max

Only updates the field if the specified value is greater than the existing field value.

$currentDate

Sets the value of a field to the current date, either as a date or as a timestamp.