For a case-insensitive query, use regex in MongoDB. Let us create a collection with documents −
> db.demo314.insertOne({"Name":"Chris brown"}); { "acknowledged" : true, "insertedId" : ObjectId("5e50d742f8647eb59e562056") } > db.demo314.insertOne({"Name":"David Miller"}); { "acknowledged" : true, "insertedId" : ObjectId("5e50d743f8647eb59e562057") } > db.demo314.insertOne({"Name":"CHRIS BROWN"}); { "acknowledged" : true, "insertedId" : ObjectId("5e50d744f8647eb59e562058") } > db.demo314.insertOne({"Name":"DAVID MILLER"}); { "acknowledged" : true, "insertedId" : ObjectId("5e50d747f8647eb59e562059") } > db.demo314.insertOne({"Name":"chris brown"}); { "acknowledged" : true, "insertedId" : ObjectId("5e50d749f8647eb59e56205a") }
Display all documents from a collection with the help of find() method −
> db.demo314.find();
This will produce the following output −
{ "_id" : ObjectId("5e50d742f8647eb59e562056"), "Name" : "Chris brown" } { "_id" : ObjectId("5e50d743f8647eb59e562057"), "Name" : "David Miller" } { "_id" : ObjectId("5e50d744f8647eb59e562058"), "Name" : "CHRIS BROWN" } { "_id" : ObjectId("5e50d747f8647eb59e562059"), "Name" : "DAVID MILLER" } { "_id" : ObjectId("5e50d749f8647eb59e56205a"), "Name" : "chris brown" }
Following is the query to make a case-insensitive query. This displays “chris brown” name available in every possible case in the document −
> db.demo314.find({"Name":/chris brown/i});
This will produce the following output −
{ "_id" : ObjectId("5e50d742f8647eb59e562056"), "Name" : "Chris brown" } { "_id" : ObjectId("5e50d744f8647eb59e562058"), "Name" : "CHRIS BROWN" } { "_id" : ObjectId("5e50d749f8647eb59e56205a"), "Name" : "chris brown" }