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MongoDB $ceil Operator
  • Last Updated : 28 Jul, 2020

MongoDB provides different types of arithmetic expression operators that are used in the aggregation pipeline stages and $ceil operator is one of them. This operator is used to find the smallest integer greater than or equal to the specified number.  

{ $ceil: <number> }

Here, the number is a valid expression until it resolves to a number. 

  • If the entered value is null, then this operator will return null.
  • If the entered value is NaN, then this operator will return NaN.
  • If the entered value is a missing field, then this operator will return null.

Examples:

In the following examples, we are working with:

Database: GeeksforGeeks



Collection: employee

Document: three documents that contain the details of the employees in the form of field-value pairs.

Using $ceil Operator:

In this example, we are going to find the smallest integer greater than or equal to the value of the perfoPoint field in the development department.

db.employee.aggregate([{$match: {department: "Development"}}, 
 {$project: {perfoPoint: 1, ceilingPoint: {$ceil: "$perfoPoint"}}}])



Using $ceil Operator in the Embedded Document:

In this example, we are going to find the smallest integer greater than or equal to the value of the perfoPoint.firstMonthPoint field in the HR department.

db.employee.aggregate([{$match: {department: "HR"}},
... {$project: {"perfoPoint.firstMonthPoint": 1,
       ceilingPoint: {$ceil: "$perfoPoint.firstMonthPoint"}}}])



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