MongoDB inverse of query to return all items except specific documents?

To get documents except some specific documents, use $nor along with $and. Let us first create a collection with documents −

> db.demo1.insertOne({"StudentName":"Chris","StudentMarks":38}); {    "acknowledged" : true,    "insertedId" : ObjectId("5e08a4f025ddae1f53b62216") } > db.demo1.insertOne({"StudentName":"David","StudentMarks":78}); {    "acknowledged" : true,    "insertedId" : ObjectId("5e08a4f725ddae1f53b62217") } > db.demo1.insertOne({"StudentName":"Mike","StudentMarks":96}); {    "acknowledged" : true,    "insertedId" : ObjectId("5e08a4fd25ddae1f53b62218") }

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

> db.demo1.find().pretty();

This will produce the following output −

{    "_id" : ObjectId("5e08a4f025ddae1f53b62216"),    "StudentName" : "Chris",    "StudentMarks" : 38 } {    "_id" : ObjectId("5e08a4f725ddae1f53b62217"),    "StudentName" : "David",    "StudentMarks" : 78 } {    "_id" : ObjectId("5e08a4fd25ddae1f53b62218"),    "StudentName" : "Mike",    "StudentMarks" : 96 }

Here is the query to get inverse of query −

> db.demo1.find({$nor:[{$and:[{'StudentName':'David'},{'StudentMarks':78}]}]});

This will produce the following output. The result displays Student records with marks except 78 −

{ "_id" : ObjectId("5e08a4f025ddae1f53b62216"), "StudentName" : "Chris", "StudentMarks" : 38 } { "_id" : ObjectId("5e08a4fd25ddae1f53b62218"), "StudentName" : "Mike", "StudentMarks" : 96 }