MongoDB query to 'sort' and display a specific number of values

To sort in MongoDB, use sort(). For displaying only a specific number of values, use LIMIT. Let us create a collection with documents −

> db.demo254.insertOne({"Name":"Chris"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e47a0ab1627c0c63e7dba7f")
}
> db.demo254.insertOne({"Name":"Adam"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e47a0b01627c0c63e7dba80")
}
> db.demo254.insertOne({"Name":"Bob"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e47a0b71627c0c63e7dba81")
}

Display all documents from a collection with the help of find() method −

> db.demo254.find();

This will produce the following output −

{ "_id" : ObjectId("5e47a0ab1627c0c63e7dba7f"), "Name" : "Chris" }
{ "_id" : ObjectId("5e47a0b01627c0c63e7dba80"), "Name" : "Adam" }
{ "_id" : ObjectId("5e47a0b71627c0c63e7dba81"), "Name" : "Bob" }

Following is the query to sort −

> db.demo254.find().sort({"Name":1});

This will produce the following output −

{ "_id" : ObjectId("5e47a0b01627c0c63e7dba80"), "Name" : "Adam" }
{ "_id" : ObjectId("5e47a0b71627c0c63e7dba81"), "Name" : "Bob" }
{ "_id" : ObjectId("5e47a0ab1627c0c63e7dba7f"), "Name" : "Chris" }

Following is the query to sort and display only a specific number of records with limit().

> db.demo254.find().sort({"Name":1}).limit(2);

This will produce the following output −

{ "_id" : ObjectId("5e47a0b01627c0c63e7dba80"), "Name" : "Adam" }
{ "_id" : ObjectId("5e47a0b71627c0c63e7dba81"), "Name" : "Bob" }

AmitDiwan

Published on 31-Mar-2020 08:12:52

• Related Questions & Answers
• MongoDB query with an 'or' condition?
• How to check for 'undefined' or 'null' in a JavaScript array and display only non-null values?
• Update 'a' record with 'b' and 'b' with 'a' in a MySQL column (swap) with only 'a' and 'b' values?
• MongoDB query to get a specific number of items
• Is calling a female 'dear' or 'sweetie' harassment of some sort?
• Program to find number of string we can make where 'a' can be 'a' or 'b', and 'b' remains 'b'in Python
• MongoDB query to limit subdocuments having the given fields of the 'projection'
• Print a number as string of 'A' and 'B' in lexicographic order in C++
• Display day number with SimpleDateFormat('d') in Java
• MySQL query to select ENUM('M', 'F') as 'Male' or 'Female'?
• MongoDB query to get only a specific number of elements
• Opposite of $addToSet to '$removeFromSet' in MongoDB?
• Query Array for 'true' value at index n in MongoDB?
• MongoDB query to display documents with a specific name irrespective of case
• MongoDB query to group records and display a specific value with dot notation