Let us create a collection with documents −
> db.demo78.insertOne({"Name1":"Chris","Name2":"Mike"}); { "acknowledged" : true, "insertedId" : ObjectId("5e2bd99c71bf0181ecc4228f") } > db.demo78.insertOne({"Name1":"Bob","Name2":"Carol"}); { "acknowledged" : true, "insertedId" : ObjectId("5e2bd9ac71bf0181ecc42290") } > db.demo78.insertOne({"Name1":"David","Name2":"Sam"}); { "acknowledged" : true, "insertedId" : ObjectId("5e2bd9b671bf0181ecc42291") } > db.demo78.insertOne({"Name1":"Jace","Name2":"John"}); { "acknowledged" : true, "insertedId" : ObjectId("5e2bd9bf71bf0181ecc42292") }
Display all documents from a collection with the help of find() method −
> db.demo78.find();
This will produce the following output −
{ "_id" : ObjectId("5e2bd99c71bf0181ecc4228f"), "Name1" : "Chris", "Name2" : "Mike" } { "_id" : ObjectId("5e2bd9ac71bf0181ecc42290"), "Name1" : "Bob", "Name2" : "Carol" } { "_id" : ObjectId("5e2bd9b671bf0181ecc42291"), "Name1" : "David", "Name2" : "Sam" } { "_id" : ObjectId("5e2bd9bf71bf0181ecc42292"), "Name1" : "Jace", "Name2" : "John" }
Following is the query to implement OR operator in find() −
> db.demo78.find({$or: [{"Name1": "Bob"}, {Name2: "John"}] });
This will produce the following output −
{ "_id" : ObjectId("5e2bd9ac71bf0181ecc42290"), "Name1" : "Bob", "Name2" : "Carol" } { "_id" : ObjectId("5e2bd9bf71bf0181ecc42292"), "Name1" : "Jace", "Name2" : "John" }