In this chapter, we will learn how to sort records in MongoDB.
The sort() Method
To sort documents in MongoDB, you need to use sort() method. The method accepts a document containing a list of fields along with their sorting order. To specify sorting order 1 and -1 are used. 1 is used for ascending order while -1 is used for descending order.
Syntax
The basic syntax of sort() method is as follows −
>db.COLLECTION_NAME.find().sort({KEY:1})Example
Consider the collection myycol has the following data.
{ "_id" : 0, "name" : "aimee Zank", "class" : 10 }
{ "_id" : 1, "name" : "Aurelia Menendez", "class" : 11 }
{ "_id" : 2, "name" : "Salena Olmos", "class" : 12 }
>Following example will display the documents sorted by id in the descending order.
> db.stuDetails.find({},{"name":1,"_id":0}).sort({"_id":-1})
{ "name" : "Salena Olmos" }
{ "name" : "Aurelia Menendez" }
{ "name" : "aimee Zank" }Please note, if you don't specify the sorting preference, then sort() method will display the documents in ascending order.