MongoDB Aggregation $count

Aggregation $count

This aggregation stage counts the total amount of documents passed from the previous stage.

Example

In this example, we are using the "sample_restaurants" database loaded from the sample data in the Intro to Aggregations section.

db.restaurants.aggregate([
  {
    $match: { "cuisine": "Chinese" }
  },
  {
    $count: "totalChinese"
  }
])

This will return the number of documents at the $count stage as a field called "totalChinese".