How to find exact Array Match with values in different order using MongoDB?

To find exact array match with values in different order, you can use $all operator. Let us create a collection with documents. Following is the query

>db.exactMatchArrayDemo.insertOne({"StudentName":"David","StudentAge":22,"StudentGameScores":[45,78,98]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c9c94702d6669774125246c") } >db.exactMatchArrayDemo.insertOne({"StudentName":"Chris","StudentAge":23,"StudentGameScores":[45,78]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c9c94a42d6669774125246d") }

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

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

This will produce the following output

{    "_id" : ObjectId("5c9c94702d6669774125246c"),    "StudentName" : "David",    "StudentAge" : 22,    "StudentGameScores" : [       45,       78,       98    ] } {    "_id" : ObjectId("5c9c94a42d6669774125246d"),    "StudentName" : "Chris",    "StudentAge" : 23,    "StudentGameScores" : [       45,       78    ] }

Following is the query to find exact array match

> db.exactMatchArrayDemo.find({ "StudentGameScores": { "$size" : 2, "$all": [ 78, 45 ] } }).pretty();

This will produce the following output

{    "_id" : ObjectId("5c9c94a42d6669774125246d"),    "StudentName" : "Chris",    "StudentAge" : 23,    "StudentGameScores" : [       45,       78    ] }

Following is the query to find exact array match but order does not matter. We have set a different size to get the field “StudentGameScores” with 3 values

> db.exactMatchArrayDemo.find({ "StudentGameScores": { "$size" : 3, "$all": [ 78, 45 ] } }).pretty();

This will produce the following output

{    "_id" : ObjectId("5c9c94702d6669774125246c"),    "StudentName" : "David",    "StudentAge" : 22,    "StudentGameScores" : [       45,       78,       98    ] }