$divide

The `$divide` operator divides two numbers and returns the quotient. The $divide operator returns an error if the divisor is zero.

Syntax

{ $divide: [ <dividend>, <divisor> ] }

Parameters

<dividend>stringrequired

Any valid expression that resolves to a number to be divided.

<divisor>stringrequired

Any valid expression that resolves to a nonzero number to divide by.

Examples

Sample Data

{
  "_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
  "sales": { "totalSales": 75670 },
  "staff": { "totalStaff": { "fullTime": 8, "partTime": 20 } }
}

Calculate the average sales volume per employee

Calculate the average sales volume per employee and the percentage of full time staff.

Query:

db.stores.aggregate([
  { $match: { _id: "40d6f4d7-50cd-4929-9a07-0a7a133c2e74" } },
  {
    $project: {
      name: 1,
      averageSalesPerStaff: {
        $divide: [
          "$sales.totalSales",
          { $add: ["$staff.totalStaff.fullTime", "$staff.totalStaff.partTime"] }
        ]
      },
      fullTimeStaffPercentage: {
        $multiply: [
          {
            $divide: [
              "$staff.totalStaff.fullTime",
              { $add: ["$staff.totalStaff.fullTime", "$staff.totalStaff.partTime"] }
            ]
          },
          100
        ]
      }
    }
  }
])

Output:

[
  {
    "_id": "40d6f4d7-50cd-4929-9a07-0a7a133c2e74",
    "name": "Proseware, Inc. | Home Entertainment Hub",
    "averageSalesPerStaff": 3893.95,
    "fullTimeStaffPercentage": 48.72
  }
]