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
Retrieving array values from a find query in MongoDB database
To retrieve array values from a find query, use dot notation. Let us create a collection with documents −
> db.demo38.insertOne({"ClientDetails":[{"ClientId":101,"ClientName":"Chris"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e176abccfb11e5c34d898d9")
}
> db.demo38.insertOne({"ClientDetails":[{"ClientId":102,"ClientName":"David"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e176ac7cfb11e5c34d898da")
}
> db.demo38.insertOne({"ClientDetails":[{"ClientId":103,"ClientName":"Mike"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e176ad0cfb11e5c34d898db")
}Display all documents from a collection with the help of find() method −
> db.demo38.find();
This will produce the following output −
{ "_id" : ObjectId("5e176abccfb11e5c34d898d9"), "ClientDetails" : [ { "ClientId" : 101, "ClientName" : "Chris" } ] }
{ "_id" : ObjectId("5e176ac7cfb11e5c34d898da"), "ClientDetails" : [ { "ClientId" : 102, "ClientName" : "David" } ] }
{ "_id" : ObjectId("5e176ad0cfb11e5c34d898db"), "ClientDetails" : [ { "ClientId" : 103, "ClientName" : "Mike" } ] }Following is the query to retrieve array values from a find query −
> db.demo38.find({"ClientDetails.ClientName":"David"});This will produce the following output −
{ "_id" : ObjectId("5e176ac7cfb11e5c34d898da"), "ClientDetails" : [ { "ClientId" : 102, "ClientName" : "David" } ] }
Updated on: 02-Apr-2020
55 Views
Advertisements