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
MongoDB query for exact match
For exact match, you can use $exists that checks for a match. Let us create a collection with documents −
> db.demo290.insertOne({"ListOfName":"Chris"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4c0c9e5d93261e4bc9ea2d")
}
> db.demo290.insertOne({"ListOfName":["Chris","David"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4c0cb05d93261e4bc9ea2e")
}Display all documents from a collection with the help of find() method −
> db.demo290.find();
This will produce the following output −
{ "_id" : ObjectId("5e4c0c9e5d93261e4bc9ea2d"), "ListOfName" : "Chris" }
{ "_id" : ObjectId("5e4c0cb05d93261e4bc9ea2e"), "ListOfName" : [ "Chris", "David" ] }Here is the query for exact match of a value −
> db.demo290.find({$and: [{'ListOfName.0': {$exists: false}}, {"ListOfName": 'Chris'}]});This will produce the following output −
{ "_id" : ObjectId("5e4c0c9e5d93261e4bc9ea2d"), "ListOfName" : "Chris" }
Updated on: 31-Mar-2020
623 Views
Advertisements