MongoDB sort() method
In MongoDB, sort() method is used to sort the documents in the collection. This method accepts a document containing list of fields along with their sorting order.
The sorting order is specified as 1 or -1.
- 1 is used for ascending order sorting.
- -1 is used for descending order sorting.
Syntax:
db.COLLECTION_NAME.find().sort({KEY:1})
Scenario
Consider an example which has a collection name javatpoint.
This collection has following fields within it.
[ { Course: "Java", details: { Duration: "6 months", Trainer: "Sonoo Jaiswal" }, Batch: [ { size: "Medium", qty: 25 } ], category: "Programming Language" }, { Course: ".Net", details: { Duration: "6 months", Trainer: "Prashant Verma" }, Batch: [ { size: "Small", qty: 5 }, { size: "Medium", qty: 10 }, ], category: "Programming Language" }, { Course: "Web Designing", details: { Duration: "3 months", Trainer: "Rashmi Desai" }, Batch: [ { size: "Small", qty: 5 }, { size: "Large", qty: 10 } ], category: "Programming Language" } ];
Execute the following query to display the documents in descending order.
`
db.javatpoint.find().sort({“Course”:-1})
`
This will show the documents in descending order.
{ "_id" : ObjectId("564dbced8e2c097d15fbb603"), "Course" : "Web Designing", "det
ails" : { "Duration" : "3 months", "Trainer" : "Rashmi Desai" }, "Batch" : [ { "
size" : "Small", "qty" : 5 }, { "size" : "Large", "qty" : 10 } ], "category" : "
Programming Language" }
{ "_id" : ObjectId("564dbced8e2c097d15fbb601"), "Course" : "Java", "details" : {
"Duration" : "6 months", "Trainer" : "Sonoo Jaiswal" }, "Batch" : [ { "size" :
"Medium", "qty" : 25 } ], "category" : "Programming Language" }
{ "_id" : ObjectId("564dbced8e2c097d15fbb602"), "Course" : ".Net", "details" : {
"Duration" : "6 months", "Trainer" : "Prashant Verma" }, "Batch" : [ { "size" :
"Small", "qty" : 5 }, { "size" : "Medium", "qty" : 10 } ], "category" : "Progra
mming Language" }