Let us first create a collection with documents -
> db.operatorDemo.insertOne({"StudentSubject":["MongoDB","MySQL","Java"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cef94eaef71edecf6a1f6a2") } > db.operatorDemo.insertOne({"StudentSubject":["Java","C","C++"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cef94faef71edecf6a1f6a3") }
Display all documents from a collection with the help of find() method -
> db.operatorDemo.find().pretty();
Output
{ "_id" : ObjectId("5cef94eaef71edecf6a1f6a2"), "StudentSubject" : [ "MongoDB", "MySQL", "Java" ] } { "_id" : ObjectId("5cef94faef71edecf6a1f6a3"), "StudentSubject" : [ "Java", "C", "C++" ] }
Following is the query for an equality without $eq operator:
> db.operatorDemo.find({StudentSubject:"MongoDB"});
Output
{ "_id" : ObjectId("5cef94eaef71edecf6a1f6a2"), "StudentSubject" : [ "MongoDB", "MySQL", "Java" ] }