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How to get element with max id in MongoDB?
To get the element with a max id, you can use the find() method. To understand the above concept, let us create a collection with the document. The query is as follows −
> db.getElementWithMaxIdDemo.insertOne({"Name":"John","Age":21});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c8bbce480f10143d8431e1c")
}
> db.getElementWithMaxIdDemo.insertOne({"Name":"Larry","Age":24});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c8bbcec80f10143d8431e1d")
}
> db.getElementWithMaxIdDemo.insertOne({"Name":"David","Age":23});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c8bbcf580f10143d8431e1e")
}
> db.getElementWithMaxIdDemo.insertOne({"Name":"Chris","Age":20});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c8bbcfe80f10143d8431e1f")
}
> db.getElementWithMaxIdDemo.insertOne({"Name":"Robert","Age":25});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c8bbd0880f10143d8431e20")
}Display all documents from a collection with the help of find() method. The query is as follows −
> db.getElementWithMaxIdDemo.find().pretty();
The following is the output −
{
"_id" : ObjectId("5c8bbce480f10143d8431e1c"),
"Name" : "John",
"Age" : 21
}
{
"_id" : ObjectId("5c8bbcec80f10143d8431e1d"),
"Name" : "Larry",
"Age" : 24
}
{
"_id" : ObjectId("5c8bbcf580f10143d8431e1e"),
"Name" : "David",
"Age" : 23
}
{
"_id" : ObjectId("5c8bbcfe80f10143d8431e1f"),
"Name" : "Chris",
"Age" : 20
}
{
"_id" : ObjectId("5c8bbd0880f10143d8431e20"),
"Name" : "Robert",
"Age" : 25
}Here is the query to get the element with max id −
> db.getElementWithMaxIdDemo.find().sort({_id:-1}).limit(1).pretty()The following is the output with a record with maximum id −
{
"_id" : ObjectId("5c8bbd0880f10143d8431e20"),
"Name" : "Robert",
"Age" : 25
}
Updated on: 30-Jul-2019
947 Views
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