MongoDB में अलग की के बराबर मान होने पर की वैल्यू अपडेट करें

पहले कलेक्शन बनाएं:

> db.demo196.insertOne({
    "Id": "101",
    "details": [
        { "FirstName": "Chris", "LastName": "Brown", "Score": 45 },
        { "FirstName": "David", "LastName": "Miller", "Score": 87 },
        { "FirstName": "John", "LastName": "Doe", "Score": 56 }
    ]
}); 
{ "acknowledged": true, "insertedId": ObjectId("5e3af6b103d395bdc21346d7") }

सभी डॉक्यूमेंट्स देखें:

> db.demo196.find();

आउटपुट:

{ "_id": ObjectId("5e3af6b103d395bdc21346d7"), "Id": "101", "details": [
    { "FirstName": "Chris", "LastName": "Brown", "Score": 45 },
    { "FirstName": "David", "LastName": "Miller", "Score": 87 },
    { "FirstName": "John", "LastName": "Doe", "Score": 56 }
] }

अलग की के मान के आधार पर की वैल्यू अपडेट करने की क्वेरी:

> db.demo196.update(
    { "details": { "$elemMatch": { "FirstName": "David", "LastName": "Miller" } } },
    { "$set": { "details.$.Score": 98 } }
); 
WriteResult({ "nMatched": 1, "nUpserted": 0, "nModified": 1 })

अपडेट के बाद सभी डॉक्यूमेंट्स:

> db.demo196.find();

आउटपुट:

{ "_id": ObjectId("5e3af6b103d395bdc21346d7"), "Id": "101", "details": [
    { "FirstName": "Chris", "LastName": "Brown", "Score": 45 },
    { "FirstName": "David", "LastName": "Miller", "Score": 98 },
    { "FirstName": "John", "LastName": "Doe", "Score": 56 }
] }