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Is there any way in MongoDB to get the inner value of json data?
To get inner value of JSON data, use find() along with dot(.) notation. Let us create a collection with documents −
> db.demo235.insertOne(
... {
... "id":101,
... "details":[
... {
... "Name":"Chris Brown",
... "Age":21
... },
... {
... "Name":"David Miller",
... "Age":24
... }
... ],
... "otherdetails":[
... {
... "Score":56,
... "Subject":"MongoDB"
... },
... {
... "Score":78,
... "Subject":"MySQL"
... }
... ]
... }
...);
{
"acknowledged" : true,
"insertedId" : ObjectId("5e418d22f4cebbeaebec514b")
}Display all documents from a collection with the help of find() method −
> db.demo235.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5e418d22f4cebbeaebec514b"),
"id" : 101,
"details" : [
{
"Name" : "Chris Brown",
"Age" : 21
},
{
"Name" : "David Miller",
"Age" : 24
}
],
"otherdetails" : [
{
"Score" : 56,
"Subject" : "MongoDB"
},
{
"Score" : 78,
"Subject" : "MySQL"
}
]
}Following is the query to get the inner value of json data −
> db.demo235.find({},{"otherdetails.Subject":1,_id:0});This will produce the following output −
{ "otherdetails" : [ { "Subject" : "MongoDB" }, { "Subject" : "MySQL" } ] }
Updated on: 30-Mar-2020
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