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
Get the size of all the documents in a MongoDB query?
To get the size of all the documents in a query, you need to loop through documents. Let us first create a collection with documents −
> db.sizeOfAllDocumentsDemo.insertOne({"StudentFirstName":"John","StudentSubject":["MongoDB","Java"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3c0c1edc6604c74817cd7")
}
> db.sizeOfAllDocumentsDemo.insertOne({"StudentFirstName":"Larry","StudentSubject":["MySQL","PHP"],"StudentAge":21});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3c0d9edc6604c74817cd8")
}
> db.sizeOfAllDocumentsDemo.insertOne({"StudentFirstName":"Chris","StudentSubject":["SQL Server","C#"],"StudentAge":23,"StudentCountryName":"US"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd3c0fbedc6604c74817cd9")
}Following is the query to display all documents from a collection with the help of find() method −
> db.sizeOfAllDocumentsDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cd3c0c1edc6604c74817cd7"),
"StudentFirstName" : "John",
"StudentSubject" : [
"MongoDB",
"Java"
]
}
{
"_id" : ObjectId("5cd3c0d9edc6604c74817cd8"),
"StudentFirstName" : "Larry",
"StudentSubject" : [
"MySQL",
"PHP"
],
"StudentAge" : 21
}
{
"_id" : ObjectId("5cd3c0fbedc6604c74817cd9"),
"StudentFirstName" : "Chris",
"StudentSubject" : [
"SQL Server",
"C#"
],
"StudentAge" : 23,
"StudentCountryName" : "US"
}Following is the query to get the size of all the documents in a query −
> var allDocument = db.sizeOfAllDocumentsDemo.find();
> var counter = 0;
> allDocument.forEach(
... function(myDocument) {
... counter = counter+Object.bsonsize(myDocument)
... }
... );
> print(counter);This will produce the following output −
358
Updated on: 30-Jul-2019
192 Views
Advertisements