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How to order by timestamp (descending order) in MongoDB
To order by timestamp, use sort() in MongoDB. Let us create a collection with documents −
> db.demo737.insertOne({"timestamp" : new ISODate("2020-04-01" )});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ead682157bb72a10bcf065c")
}
> db.demo737.insertOne({"timestamp" : new ISODate("2020-10-31" )});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ead682757bb72a10bcf065d")
}
> db.demo737.insertOne({"timestamp" : new ISODate("2020-05-02" )});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ead682a57bb72a10bcf065e")
}Display all documents from a collection with the help of find() method −
> db.demo737.find();
This will produce the following output −
{ "_id" : ObjectId("5ead682157bb72a10bcf065c"), "timestamp" : ISODate("2020-04-01T00:00:00Z") }
{ "_id" : ObjectId("5ead682757bb72a10bcf065d"), "timestamp" : ISODate("2020-10-31T00:00:00Z") }
{ "_id" : ObjectId("5ead682a57bb72a10bcf065e"), "timestamp" : ISODate("2020-05-02T00:00:00Z") }Following is the query to order by timestamp (descending order) −
> db.demo737.find().sort({"timestamp":-1});This will produce the following output −
{ "_id" : ObjectId("5ead682757bb72a10bcf065d"), "timestamp" : ISODate("2020-10-31T00:00:00Z") }
{ "_id" : ObjectId("5ead682a57bb72a10bcf065e"), "timestamp" : ISODate("2020-05-02T00:00:00Z") }
{ "_id" : ObjectId("5ead682157bb72a10bcf065c"), "timestamp" : ISODate("2020-04-01T00:00:00Z") }
Updated on: 30-Jun-2020
2K+ Views
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