MongoDB $divide Operator
MongoDB provides different types of arithmetic expression operators that are used in the aggregation pipeline stages and $divide operator is one of them. This operator is used to divide one number by another number and return the result of the division.
Syntax:
{ $divide: [ <expression1>, <expression2> ] }
Here, in this operator, the arguments passed in an array. And the first argument is a dividend and the second argument is a divisor. The argument must be a valid expression until it resolves to a number.
Examples:
In the following examples, we are working with:
Database: w3wiki
Collection: employee
Document: three documents that contain the details of the employees in the form of field-value pairs.
Divide using $divide operator:
In this example, we are going to divide the salary of the development department’s employees into half.
db.employee.aggregate([{$match: {department: "Development"}}, ... {$project: {name: 1, halfSalary: {$divide: ["$salary", 2]}}}])
Divide using $divide operator in the embedded document:
In this example, we are going to divide the salary of the HR department’s employees into half.
db.employee.aggregate([{$match: {department: "HR"}}, ... {$project: {name: 1, halfsalary: {$divide: ["$details.salary", 2]}}}])
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