- 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
Why does my MongoDB group query return always 0 in float conversion? How to fix it?
For float conversion, use parseFloat() in MongoDB. Let us create a collection with documents −
> db.demo523.insertOne({"details":{values:"-0.45"}});{ "acknowledged" : true, "insertedId" : ObjectId("5e89b7efb3fbf26334ef611f") }
Display all documents from a collection with the help of find() method −
> db.demo523.find();
This will produce the following output −
{ "_id" : ObjectId("5e89b7efb3fbf26334ef611f"), "details" : { "values" : "-0.45" } }
Following is the query that does not result 0 in the conversion of float −
>db.getCollection('demo523').find({}).forEach( function(d) ... { d.details.values = parseFloat( d.details.values ) ... db.getCollection('demo523').save(d)} );
Display all documents from a collection with the help of find() method −
> db.demo523.find();
This will produce the following output −
{ "_id" : ObjectId("5e89b7efb3fbf26334ef611f"), "details" : { "values" : -0.45 } }
Advertisements
To Continue Learning Please Login
Login with Google