You are viewing an offline version of MongoDB documentation. Some page features might be unavailable. To view the latest version of the page or use interactive features, visit the live page.

Docs Home

Database Manual

Aggregation Operations

Reference

Operators

$lte (aggregation)

Definition

$lte

Compares two values and returns:

true when the first value is less than or equivalent to the second value.
false when the first value is greater than the second value.

The $lte compares both value and type, using the specified BSON comparison order for values of different types.

$lte has the following syntax:

{ $lte: [ <expression1>, <expression2> ] }

For more information on expressions, see Expression Operators.

Example

Consider an inventory collection with the following documents:

db.inventory.insertMany( [
   { _id : 1, item : "abc1", description: "product 1", qty: 300 },
   { _id : 2, item : "abc2", description: "product 2", qty: 200 },
   { _id : 3, item : "xyz1", description: "product 3", qty: 250 },
   { _id : 4, item : "VWZ1", description: "product 4", qty: 300 },
   { _id : 5, item : "VWZ2", description: "product 5", qty: 180 }
] )

The following operation uses the $lte operator to determine if qty is less than or equal to 250:

db.inventory.aggregate(
   [
     {
       $project:
          {
            item: 1,
            qty: 1,
            qtyLte250: { $lte: [ "$qty", 250 ] },
            _id: 0
          }
     }
   ]
)

The operation returns the following results:

{ "item" : "abc1", "qty" : 300, "qtyLte250" : false }
{ "item" : "abc2", "qty" : 200, "qtyLte250" : true }
{ "item" : "xyz1", "qty" : 250, "qtyLte250" : true }
{ "item" : "VWZ1", "qty" : 300, "qtyLte250" : false }
{ "item" : "VWZ2", "qty" : 180, "qtyLte250" : true }

Back

$lt

$ltrim