count

$count

Counts the number of documents input to the $count stage and outputs the document count with your custom field name to the next phase in the aggregation pipeline.

Syntax

{ "$count": "<string>" }

For the <string> placeholder, enter a custom name for the output field that has the count as its value. The string you enter cannot contain the following:

• The special character,.
• The special character, $, at the start of the string
• An empty string

Sample Request

[
	{
		"$match": {
			"temp": {
				"$gt": 10
			}
		}
	},
	{
		"$count": "tempGreaterThan10"
	}
]

Sample Response

{
	"_list": [
		{
			"tempGreaterThan10": 44
		}
	]
}