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
Query array of nested string with MongoDB?
To query array of nested string, you can use the dot(.) notation. Let us first create a collection with documents −
> db.nestedStringDemo.insertOne(
{
"CustomerName": "John",
"CustomerOtherDetails": [ { "Age":29, "CountryName": "US" },
{ "CompanyName": "Amazon",
"Salary": 150000, "ProjectName": ["Online Library Management System", "Pig Dice Game"]
} ] }
);
{
"acknowledged" : true,
"insertedId" : ObjectId("5cea4629ef71edecf6a1f690")
}
> db.nestedStringDemo.insertOne(
{
"CustomerName": "Chris",
"CustomerOtherDetails": [ { "Age":27, "CountryName": "AUS" },
{ "CompanyName": "Google",
"Salary": 250000, "ProjectName": ["Chat Application", "Game Design"]
} ] }
);
{
"acknowledged" : true,
"insertedId" : ObjectId("5cea466eef71edecf6a1f691")
}Following is the query to display all documents from a collection with the help of find() method −
> db.nestedStringDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cea4629ef71edecf6a1f690"),
"CustomerName" : "John",
"CustomerOtherDetails" : [
{
"Age" : 29,
"CountryName" : "US"
},
{
"CompanyName" : "Amazon",
"Salary" : 150000,
"ProjectName" : [
"Online Library Management System",
"Pig Dice Game"
]
}
]
}
{
"_id" : ObjectId("5cea466eef71edecf6a1f691"),
"CustomerName" : "Chris",
"CustomerOtherDetails" : [
{
"Age" : 27,
"CountryName" : "AUS"
},
{
"CompanyName" : "Google",
"Salary" : 250000,
"ProjectName" : [
"Chat Application",
"Game Design"
]
}
]
}Now, let us query an array of nested string using dot notation −
> db.nestedStringDemo.find({"CustomerOtherDetails.ProjectName":"Chat Application"}).pretty();This will produce the following output −
{
"_id" : ObjectId("5cea466eef71edecf6a1f691"),
"CustomerName" : "Chris",
"CustomerOtherDetails" : [
{
"Age" : 27,
"CountryName" : "AUS"
},
{
"CompanyName" : "Google",
"Salary" : 250000,
"ProjectName" : [
"Chat Application",
"Game Design"
]
}
]
}
Updated on: 30-Jul-2019
108 Views
Advertisements