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How to make a case-insensitive query in MongoDB?
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" }
Updated on: 01-Apr-2020
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