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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 our sample data in the 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".

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MongoDB Aggregation $count

Aggregation $count

Example

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MongoDB Aggregation `$count`

Aggregation `$count`