Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to search for documents based on the value of adding two properties in MongoDB?
You can use aggregate framework for this. Here, we will get the sum and then match it to search for documents less than a particular number. Let us first create a collection with documents −
> db.searchDocumentsDemo.insertOne({"Value1":100,"Value2":560});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3fe1eedc6604c74817ce9")
}
> db.searchDocumentsDemo.insertOne({"Value1":300,"Value2":150});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3fe29edc6604c74817cea")
}
> db.searchDocumentsDemo.insertOne({"Value1":400,"Value2":200});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3fe30edc6604c74817ceb")
}
> db.searchDocumentsDemo.insertOne({"Value1":190,"Value2":210});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3fe45edc6604c74817cec")
}Following is the query to display all documents from a collection with the help of find() method −
> db.searchDocumentsDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cd3fe1eedc6604c74817ce9"),
"Value1" : 100,
"Value2" : 560
}
{
"_id" : ObjectId("5cd3fe29edc6604c74817cea"),
"Value1" : 300,
"Value2" : 150
}
{
"_id" : ObjectId("5cd3fe30edc6604c74817ceb"),
"Value1" : 400,
"Value2" : 200
}
{
"_id" : ObjectId("5cd3fe45edc6604c74817cec"),
"Value1" : 190,
"Value2" : 210
}Following is the query to search for documents based on the value of adding two properties on the document −
> db.searchDocumentsDemo.aggregate([
... { $project: {totalValue: { $add: [ "$Value1", "$Value2" ] } } },
... { $match: {totalValue: {$lt: 500 }} }
... ]);This will produce the following output −
{ "_id" : ObjectId("5cd3fe29edc6604c74817cea"), "totalValue" : 450 }
{ "_id" : ObjectId("5cd3fe45edc6604c74817cec"), "totalValue" : 400 }
Updated on: 30-Jul-2019
49 Views
Advertisements