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Fetch a specific document in MongoDB with array elements
To fetch a specific document, use dot notation in MongoDB find(). Let us create a collection with documents −
> db.demo672.insertOne({Brand:[{CategoryName:"Mobile","Name":"Oppo"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea3ea9b04263e90dac943e5")
}
> db.demo672.insertOne({Brand:[{CategoryName:"Mobile","Name":"Samsung"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea3eaa404263e90dac943e6")
}
> db.demo672.insertOne({Brand:[{CategoryName:"Mobile","Name":"OnePlus"}]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea3eacc04263e90dac943e7")
}Display all documents from a collection with the help of find() method −
> db.demo672.find();
This will produce the following output −
{ "_id" : ObjectId("5ea3ea9b04263e90dac943e5"), "Brand" : [ { "CategoryName" : "Mobile", "Name" : "Oppo" } ] }
{ "_id" : ObjectId("5ea3eaa404263e90dac943e6"), "Brand" : [ { "CategoryName" : "Mobile", "Name" : "Samsung" } ] }
{ "_id" : ObjectId("5ea3eacc04263e90dac943e7"), "Brand" : [ { "CategoryName" : "Mobile", "Name" : "OnePlus" } ] }Following is the query to fetch a specific document −
> db.demo672.find({"Brand.Name":"OnePlus"});This will produce the following output −
{ "_id" : ObjectId("5ea3eacc04263e90dac943e7"), "Brand" : [ { "CategoryName" : "Mobile", "Name" : "OnePlus" } ] }
Updated on 13-May-2020 09:58:05
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