Update two separate arrays in a document with one update call in MongoDB?

You can use $push operator for this. Let us first create a collection with documents

>db.twoSeparateArraysDemo.insertOne({"StudentName":"Larry","StudentFirstGameScore":[98],"StudentSecondGameScore":[77]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c9b152815e86fd1496b38b8") } >db.twoSeparateArraysDemo.insertOne({"StudentName":"Mike","StudentFirstGameScore":[58],"StudentSecondGameScore":[78]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c9b152d15e86fd1496b38b9") } >db.twoSeparateArraysDemo.insertOne({"StudentName":"David","StudentFirstGameScore":[65],"StudentSecondGameScore":[67]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c9b153315e86fd1496b38ba") }

Following is the query to display all documents from a collection with the help of find() method

> db.twoSeparateArraysDemo.find().pretty();

This will produce the following output

{    "_id" : ObjectId("5c9b152815e86fd1496b38b8"),    "StudentName" : "Larry",    "StudentFirstGameScore" : [       98    ],    "StudentSecondGameScore" : [       77    ] } {    "_id" : ObjectId("5c9b152d15e86fd1496b38b9"),    "StudentName" : "Mike",    "StudentFirstGameScore" : [       58    ],    "StudentSecondGameScore" : [       78    ] } {    "_id" : ObjectId("5c9b153315e86fd1496b38ba"),    "StudentName" : "David",    "StudentFirstGameScore" : [       65    ],    "StudentSecondGameScore" : [       67    ] }

Following is the query to push two separate arrays in one update call in MongoDB

> db.twoSeparateArraysDemo.update({_id:ObjectId("5c9b152d15e86fd1496b38b9")}, { $push : {    StudentFirstGameScore : 45, StudentSecondGameScore : 99}}); WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

Let us check the value is pushed in two separate arrays or not

> db.twoSeparateArraysDemo.find().pretty();

This will produce the following output

{    "_id" : ObjectId("5c9b152815e86fd1496b38b8"),    "StudentName" : "Larry",    "StudentFirstGameScore" : [       98    ],    "StudentSecondGameScore" : [       77    ] } {    "_id" : ObjectId("5c9b152d15e86fd1496b38b9"),    "StudentName" : "Mike",    "StudentFirstGameScore" : [       58,       45    ],    "StudentSecondGameScore" : [       78,       99    ] } {    "_id" : ObjectId("5c9b153315e86fd1496b38ba"),    "StudentName" : "David",    "StudentFirstGameScore" : [       65    ],    "StudentSecondGameScore" : [       67    ] }